BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:G. Passarelli - Quantum annealing with dissipation DTSTART;VALUE=DATE-TIME:20190917T153000Z DTEND;VALUE=DATE-TIME:20190917T155000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-285@cern.ch DESCRIPTION:Quantum annealing is a branch of quantum computation aimed at solving optimization problems. The optimization problem is encoded in a qu antum Hamiltonian\, whose ground state is the wanted solution. Standard qu antum annealing works as follows. The qubit system is prepared in the grou nd state of a simple Hamiltonian. Then\, the qubits are evolved in time us ing a time-dependent Hamiltonian that\, at the final time\, coincides with the one used to encode the optimization problem. If the evolution is slow compared to the minimal level spacing\, then the adiabatic theorem of qua ntum mechanics ensures macroscopic occupation of the target ground state a t the end of the evolution.\n\nThe algorithm is limited by small spectral gaps\, occurring in the presence of quantum phase transitions\, and is rea lized in the presence of dissipation\, due to the interaction with the env ironment. While disruptive in general\, low-temperature environments can s ometimes favor quantum annealing\, improving the success probability. This beneficial effect can be further enhanced using pauses at specific times during the dynamics\, favoring thermal relaxation towards the ground state .\n\nMy talk will present some results concerning quantum annealing in the presence of dissipation\, with and without pauses\, for the p-spin model\ , a prototypical Ising system often used as a benchmark for quantum anneal ing. This model is hardly studied experimentally due to its full connectiv ity and the presence of p-body interactions. However\, its rotational symm etry allows for an easy numerical analysis in the weak coupling limit. I w ill show that dissipation and pauses can improve the success probability o f the quantum annealing of this model.\n\nhttps://indico.unina.it/event/24 /contributions/285/ LOCATION: URL:https://indico.unina.it/event/24/contributions/285/ END:VEVENT BEGIN:VEVENT SUMMARY:H. Ahmad - Electrodynamics of Highly Spin-Polarized Tunnel Josephs on Junctions DTSTART;VALUE=DATE-TIME:20190919T155000Z DTEND;VALUE=DATE-TIME:20190919T161000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-302@cern.ch DESCRIPTION:The continuous development of superconducting electronics is e ncouraging several studies on hybrid Josephson Junctions (JJs)\, such as S FS heterostructures. The competition between the superconducting order par ameter in the electrodes and the ferromagnetic order parameter in the barr ier leads to unconventional properties like: second harmonics in the curre nt-phase relation (CPR)\, a transition in the phase difference between the electrodes from 0 to π and the formation of spin-triplet Cooper pairs cu rrents\, exploitable in spintronic devices and switchable elements in quan tum/classical circuits. However\, most of the applications of SFS JJs in r eal superconducting circuits are limited by the high decoherence in these devices due to quasiparticles poisoning. We propose here an electrodynamic characterization of a new kind of ferromagnetic JJs in which the barrier is an insulating ferromagnet (tunnel-ferromagnetic spin-filter JJs). Spin- filter JJs show evidences of MQT and an incomplete 0-π transition that co uld enhance the capabilities of SFS JJs also as active elements. In order to meet specific circuit requirements it is necessary a full comprehension of the dissipation processes and the knowledge of the scaling laws with t he thickness of fundamental electrodynamics parameters\, like the resistan ce due to the quasiparticles and the capacitance of the device. We show th at the Tunnel Junction Microscopic (TJM) model leads to a reliable and sel f-consistent estimation of these parameters\, and that our self-consistent approach can be fully extended to other type of tunnel JJs.\n\nhttps://in dico.unina.it/event/24/contributions/302/ LOCATION: URL:https://indico.unina.it/event/24/contributions/302/ END:VEVENT BEGIN:VEVENT SUMMARY:A. Miano - Symmetric rf SQUID – universal element for Scalable Q uantum Information Processing DTSTART;VALUE=DATE-TIME:20190919T153000Z DTEND;VALUE=DATE-TIME:20190919T155000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-301@cern.ch DESCRIPTION:Building scalable Quantum Information Processing systems requi res the ability to perform addressing\, readout\, control\, addressing and signal distribution for individual quantum elements using low-power cryog enic devices co-located or integrated at the mK stage. We propose to acco mplish this using a novel superconducting device - Symmetric rf-SQUID. Thi s device has been successfully tested as the fundamental element of a Symm etric Traveling Wave Parametric Amplifier (STWPA)\, giving improved perfor mances with respect to the existing TWPAs. Thanks to its flexibility\, the Symmetric rf-SQUID allowed us to independently tune both even and odd non linear terms of the Josephson current-phase relation. Based on this behavi or\, we perform analytical and numerical simulations showing the possibili ty to operate the Symmetric rf-SQUID in many scenarios as rf up-down conve rsion mixers\, tunable-unitary gain phase shifters and linear tunable indu ctances with an inductance-value-independent weak nonlinearity. The obtain ed results will be presented and discussed.\n\nhttps://indico.unina.it/eve nt/24/contributions/301/ LOCATION: URL:https://indico.unina.it/event/24/contributions/301/ END:VEVENT BEGIN:VEVENT SUMMARY:D. Salvoni - Double dark counts rates in NbTiN SNSPD DTSTART;VALUE=DATE-TIME:20190918T170000Z DTEND;VALUE=DATE-TIME:20190918T172000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-300@cern.ch DESCRIPTION:In this work we present a study on the dark counts rate in a N bTiN\nSuperconducting Nanowire Single Photon Detectros (SNSPD). The strip is 80nm wide\, hence\nwe are in the 2D regime. We measure the distribution of the time intervals elapsed between two\nconsecutive dark pulses at 4\, 2K and we do not observe a simple Poisson distribution as expected\nbut a combination of two Poisson-like processes\, occurring with two dierent rat es. The two\nmeasured dark counts rate exhibit a dierent dependence on the bias current: one process\ndominates at lower bias and the other bocomes more prominent as the current increases. In\nthe scenario presented by Ejr naes et al. [1]\, this result could conrm that\, in this temperature\nregi me\, dark counts are generated mainly by multiple consecutive\nuctuation e vents. The result\ncan also be a footprint of two dierent process occurrin g in the nanostrip.\n\nReferences\n[1] Ejrnaes M\, Salvoni D\, Parlato L\, Massarotti D\, Caruso R\, Tafuri F\, Yang X Y\, You L X\, Wang Z\, Pepe G P and Cristiano R 2019 Scientific Reports 9 8053\n\nhttps://indico.unina. it/event/24/contributions/300/ LOCATION: URL:https://indico.unina.it/event/24/contributions/300/ END:VEVENT BEGIN:VEVENT SUMMARY:I. Mastroserio - Experimental proof of Quantum Zeno-assisted Noise Sensing DTSTART;VALUE=DATE-TIME:20190918T164000Z DTEND;VALUE=DATE-TIME:20190918T170000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-299@cern.ch DESCRIPTION:The ideal quantum Zeno effect is a robust method to protect th e coherent dynamics of a quantum system. In particular\, in the weak quant um Zeno regime\, repeated quantum projective measurements can allow the se nsing of semi-classical field fluctuations.\nIn this talk I will show our proposal and demonstration\, both theoretical and experimental\, of a nove l noise-sensing scheme enabled by the weak quantum Zeno regime. We experim entally tested these theoretical results on a Bose-Einstein Condensate of 87Rb atoms realized on an atom chip\, by sensing ad hoc introduced noisy f ields.\n\nhttps://indico.unina.it/event/24/contributions/299/ LOCATION: URL:https://indico.unina.it/event/24/contributions/299/ END:VEVENT BEGIN:VEVENT SUMMARY:M. Minutillo - Anomalous Josephson effect in S/SO/F/S heterostruct ures DTSTART;VALUE=DATE-TIME:20190918T162000Z DTEND;VALUE=DATE-TIME:20190918T164000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-298@cern.ch DESCRIPTION:Hybrid mesoscopic systems in which conventional superconductiv ity\, spin-orbit interactions\, and magnetism come into play at the same t ime\, have attracted a lot of interest in recent studies\, allowing for th e possibility to carry\, manipulate and transform quantum information\, wh ich is a great advantage to develop components for applications in quantum technology.\nIn particular\, superconducting circuits with Josephson junc tions are among the leading candidates for the realization of the fundamen tal building blocks of a quantum computer.\nIn this context\, we present a study concerning the anomalous Josephson effect [1]\, predicting a finite pair current in the absence of phase difference between the superconducto rs.\nWe focus to S/SO/F/S system in which spin-orbit coupled and ferromagn etic layers alternate. We calculate the Josephson current carried by the s ubgap Andreev levels calculated as a function of the phase difference φ b etween the two superconductors\, using a scattering matrix formalism\, bas ed of phenomenological scattering matrices. We show that the coexistence o f spin-orbit interaction and Zeeman effect is sufficient to break spin rot ation and time-reversal symmetry in spatially separated regions of the jun ction\, allowing to observe an anomalous Josephson effect. We also show th at in the presence of an anomalous phase shift\, a direction dependent cri tical current can show up.\nFinally\, future perspectives of our work will be discussed\, such as a semi-empirical microscopic description of the su perconducting proximity effect\, where the transport properties of the sys tem are studied using the recursive Green’s functions method on a two- d imensional Bogoliubov De Gennes tight-binding Hamiltonian.\n\nReferences:\ n[1] M. Minutillo\, D. Giuliano\, P. Lucignano\, A. Tagliacozzo\, and G. C ampagnano\, Phys. Rev. B 98\, 144510 (2018).\n\nhttps://indico.unina.it/ev ent/24/contributions/298/ LOCATION: URL:https://indico.unina.it/event/24/contributions/298/ END:VEVENT BEGIN:VEVENT SUMMARY:M. D'Antuono - Quantum Technologies with 2D-oxides DTSTART;VALUE=DATE-TIME:20190918T160000Z DTEND;VALUE=DATE-TIME:20190918T162000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-297@cern.ch DESCRIPTION:Spintronics and Quantum Electronics represent the new candidat es for future high-performance computer and information processes. The use of the electron spin\, rather than charge\, as information carrier\, can for instance define the unit of quantum information: the quantum bit (qubi t). Recent developments have shown that the exploitation of the Rashba Spi n Orbit Coupling (SOC) in two-dimensional (2D) materials is an innovative and attractive solution for the quantum computation. For example\, SOC is used for a more efficient charge to spin conversion in spin-orbit torque d evices.\nHere we propose two-dimensional oxide (2D-oxides) systems as inno vative quantum devices 1. The idea is to combine Rashba spin-orbit couplin g (SOC)\, 2D-magnetism\, superconductivity (SC) and high-mobility in the s ame 2D electron gas (2DEG) that is formed at the interface between wide ba ndgap insulators oxides. We have demonstrated that the superconducting 2DE G created at the interface between LaAlO3 and SrTiO3 (LAO/STO) becomes spi n polarized by introducing a few unit cells of delta doping EuTiO3 (ETO)\, an antiferromagnetic (AF) insulator iso-structural to STO 2. Firstly\, we have investigated the interplay between ferromagnetism and Rashba spin-or bit interactions by studying the magnetoconductance curves of the 2DEG as a function of the applied gate voltage and temperature 3. Recently we have also found that the interface exhibits\, under visible light\, a persiste nt photoconductivity and anomalous Hall effect. This feature is probably r elated to the different nature of the photo-excited spin-polarized 4f carr iers due to ETO.\nThe application of oxide 2DEGs to advanced electronics r equires also the creation of suitably designed nanodevices. We have realiz ed (LAO/STO) tunnel devices using Helium focused ion beam (He-FIB). Our pr eliminary measurements show that these devices are fully tunable and could have interesting tunnel I-V characteristics. Our results show that these oxide nanodevices could have a significant and far-reaching impact for new quantum spintronic development.\n\nhttps://indico.unina.it/event/24/contr ibutions/297/ LOCATION: URL:https://indico.unina.it/event/24/contributions/297/ END:VEVENT BEGIN:VEVENT SUMMARY:V. Piselli - Study of the Josephson current along the BCS side of the BSC-BEC crossover DTSTART;VALUE=DATE-TIME:20190918T154000Z DTEND;VALUE=DATE-TIME:20190918T160000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-296@cern.ch DESCRIPTION:Since its theoretical prediction in 1962 [1]\, the tunnelling current (with no applied voltage) that arises in a system constituted by t wo superconductors separated by a barrier has been the subject of many sci entific studies. It was quite soon discovered that the current-phase relat ion I=ICsin(ϕ) (where ϕ is the phase difference between the order parame ter of the two superconductors) as predicted in [1] does not always apply\ , depending both on the temperature and the barrier of the system. As a ma tter of fact\, quite different types of current-phase relation can be foun d using as the separating barrier either insulators\, normal metals\, and superconductors\, or more general constrictions of different heights and w idths both in condensed matter and in ultra-cold atoms experiments.\n\nIn order to better understand the mechanism at the basis of the DC Josephson effect and to model both the current-phase relation and the critical value IC\, several theoretical and numerical approaches have been developed. Th e early works relied mostly on the Ginzburg-Landau equations [2][3][4][5][ 6]\, but there were also attempts to use microscopic theories [7][8][9] or perturbative calculations [10]. More recently methods have been developed based on the quasi-classical Green’s functions [11][12] and the Bogoliu bov-deGennes (BdG) equations [13][14].\nDespite some good agreements with the experimental data [15][11][12]\, none of these approaches could be suc cessfully applied to the following circumstances of physical interest:\n\n over the whole temperature range from T=0 to T=Tc\;\n to all possib le barrier widths and heights\;\n along (most part of) the BCS-BEC cros sover.\n\nThe main reason underlying of our study of the DC Josephson effe ct has been to fill this gap. To this end\, we have made use of a local-ph ase-density approximation to the BdG equations\, both in its local (LPDA) [16] and non-local (NLPDA) [17] versions. Both LPDA and NLPDA approaches\, which are computationally faster and less storage demanding than the BdG equations\, give us the opportunity to study the behavior of the Josephson current with reliable results along the BCS side of the BCS-BEC crossover \, with no limitations on the barrier width and down to low temperatures.\ n\nREFERENCES:\n\n[1] B.D. Josephson. Possible new effects in superconduct ive tunnelling.\nPhysics letters\, 1(7):251–253\, 1962.\n\n[2] P. De Gen nes. Self-consistent calculation of the josephson current. Phys.\nletters\ , 5\, 1963.\n\n[3] P. de Gennes. Boundary effects in superconductors. Revi ews of Modern\nPhysics\, 36(1):225\, 1964.\n\n[4] H.J. Fink. Supercurrents through superconducting-normal-superconducting\nproximity layers. i. anal ytic solution. Physical Review B\, 14(3):1028\, 1976.\n\n[5] H.J. Fink and RS Poulsen. Supercurrents through proximity layers. ii. numeri-\ncal solu tion of superconducting-normal-superconducting and superconducting-\nsuper conducting-superconducting weak links. Physical Review B\, 19(11):5716\,\n 1979.\n\n[6] A. Baratoff\, J.A. Blackburn\, and Brian B Schwartz. Current- phase\nrelationship in short superconducting weak leans. Physical Review L etters\,\n25(16):1096\, 1970.\n\n[7] L. Aslamazov\,A. Larkin\, Yu N Ovchin nikov\, and Z Fiz. Josephson effect in\nsuperconductors separated by a nor mal metal. Sov. Phys. JETP\, 28(1):171\,\n1969.\n\n[8] I.O. Kulik. Macrosc opic quantization and the proximity effect in sns junctions. Soviet Journa l of Experimental and Theoretical Physics\, 30:944\, 1969.\n\n[9] J. Barde en and J.L. Johnson. Josephson current flow in pure\nsuperconducting-norma l-superconducting junctions.Physical Review B\,5(1):72\, 1972.\n\n[10] V. Ambegaokar and A. Baratoff. Tunneling between superconductors.\nPhysical R eview Letters\, 10(11):486\, 1963.\n\n[11] F.K. Wilhelm\, A.D. Zaikin\, an d G. Schön. Superconducting current\nin narrow proximity wires. Czechoslo vak Journal of Physics\, 46(4):2395–2396\,\n1996.\n\n[12] P. Dubos\, H. Courtois\, B. Pannetier\, F.K. Wilhelm\, A.D. Zaikin\, and G. Schön.\nJos ephson critical current in a long mesoscopic sns junction. Physical Review \nB\, 63(6):064502\, 2001.\n\n[13] A. Spuntarelli\, P. Pieri\, and G. Calv anese Strinati. Solu-\ntion of the bogoliubov–de gennes equations at zer o temperature throughout\nthe bcs–bec crossover: Josephson and related e ffects. Physics Reports\, 488(4-\n5):111–167\, 2010.\n\n[14] G. Watanabe \, F. Dalfovo\, L.P. Pitaevskii\, and S. Stringari.\nEffects of periodic p otentials on the critical velocity of superfluid fermi gases\nin the bcs-b ec crossover. Physical Review A\, 83(3):033621\, 2011.\n\n[15] C.S. Lim\, J.D. Leslie\, H.J.T. Smith\, P. Vashishta\, and J.P. Carbotte. Temperature variation of the dc josephson current in pb-pb tunnel junctions. Physical Review B\, 2(6):1651\, 1970.\n\n[16] S. Simonucci and G.C. Strinati. Equa tion for the superfluid gap obtained by\ncoarse graining the bogoliubov– de gennes equations throughout the bcs-bec\ncrossover. Phys. Rev. B\, 89:0 54511\, Feb 2014.\n\n[17] S. Simonucci and G. Calvanese Strinati. Nonlocal equation for the supercon-\nducting gap parameter. Phys. Rev. B\, 96:0545 02\, Aug 2017.\n\nhttps://indico.unina.it/event/24/contributions/296/ LOCATION: URL:https://indico.unina.it/event/24/contributions/296/ END:VEVENT BEGIN:VEVENT SUMMARY:I. Vagniluca - Quantum key distribution: field trials and practica l challenges DTSTART;VALUE=DATE-TIME:20190918T145000Z DTEND;VALUE=DATE-TIME:20190918T151000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-295@cern.ch DESCRIPTION:Quantum key distribution (QKD\, or more generically\, quantum cryptography) is today the sole technology able to guarantee unconditional security in sensitive data exchange\, as QKD protocols are in principle e ffective regardless of the computational power available to a potential ea vesdropper. Although QKD devices are already adopted outside the laborator ies\, this technology is still far from a large-scale deployment in existi ng fiber networks and telecom infrastructures\, due to practical issues as low secret-key rate achievable\, high costs and high requirements in term s of low-noise fiber links. These practical challenges in experimental QKD are the main topic of my talk. Indeed\, my PhD project is focused on QKD in-field demonstrations\, with the aim of proving its compatibility with a lready installed fiber links\, while also testing its robustness against c lassical signals co-propagating through the same fiber. Specifically\, I w ill address two QKD field-trials involving a metropolitan fiber channel in Florence and a submarine fiber link between Sicily and Malta. In addition \, I will show the results of my collaboration with Technical University o f Denmark\, in which we set up a prototype for high-dimensional QKD\, with the aim of increasing the secret-key rate achievable while maintaining a cost-effective experimental apparatus.\n\nhttps://indico.unina.it/event/24 /contributions/295/ LOCATION: URL:https://indico.unina.it/event/24/contributions/295/ END:VEVENT BEGIN:VEVENT SUMMARY:F. Conte - The tuning-on-demand paradigm of van der Waals heterost ructures: from first-principles calculations to possible applications DTSTART;VALUE=DATE-TIME:20190918T143000Z DTEND;VALUE=DATE-TIME:20190918T145000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-294@cern.ch DESCRIPTION:In the recent years van der Waals heterostructures (vdWHs) hav e received great interest\, due to their physical properties and attractiv e applications in nanoelectronics and optoelectronics. These systems have an unprecedented number of degrees of freedom\, such as number of layers\, stacking order\, interlayer distance\, twist angle and so on. Tuning them significantly affects the electronic properties of the system\, leading t o a new “tuning-on-demand paradigm”\, which highlights how vdWHs can b e suitably used for the implementation of new electronic devices and quant um technologies. In this talk this paradigm is applied to vdWHs based on t ransition-metal dichalcogenides (TMDs). First principles calculations of t he structural and electronic properties of these systems unveil the richne ss and tunability of such properties\, providing a contribution to new ele ctronic devices architectures and quantum emitter configurations for nanop hotonics and quantum information applications.\n\nReferences\n- Felice Con te\, Domenico Ninno\, and Giovanni Cantele\, Phys. Rev. B 99\, 155429 (201 9)\n- Felice Conte\, Domenico Ninno\, and Giovanni Cantele\, “Bands tuni ng in transition metal dichalcogenide heterostructures: the interplay betw een thickness and electric field” submitted\n\nhttps://indico.unina.it/e vent/24/contributions/294/ LOCATION: URL:https://indico.unina.it/event/24/contributions/294/ END:VEVENT BEGIN:VEVENT SUMMARY:E. Faraji - Quantum state transfer in protein α-helices. DTSTART;VALUE=DATE-TIME:20190918T141000Z DTEND;VALUE=DATE-TIME:20190918T143000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-293@cern.ch DESCRIPTION:The Davydov model describes energy transfer in the hydrogen-bo nded spines that stabilize protein α-helices. Its Hamiltonian has three p arts: Ĥ =Ĥ ex+Ĥ ph+Ĥ int\, where Ĥ ex is the exciton Hamiltonian (describing the internal amide-I excitations of the peptide groups)\, Ĥ ph is the phonon Hamiltonian (describing deformational oscillations of th e lattice) and Ĥ int is the interaction Hamiltonian (describing the inte raction of amide-I excitation with the motions of the lattice sites).\nThe primary goal of the thesis project is to go beyond the energy transfer an d study the full state transfer along the α-helix by considering the Hami ltonian Ĥ as corresponding to a spin network.\nPreliminary investigatio ns on the phase dynamics\, which only account for Ĥ ex\, show the possib ility of perfect state transfer between distant qubit.\nWe suspect however that the addition of Ĥ ph+Ĥ int can wash out the coherence\, and we a re currently estimating the time scale of this effect.\nSubsequently\, we will pursue the same goal by modifying the Davydov model. In particular\, we plan to introduce physically motivated anharmonic terms in Ĥ ph and s ite-dependent coupling constants in Ĥ int. These could lead to coherence recovery and hence facilitate the quantum state transfer through the prot ein α-helices.\n\nhttps://indico.unina.it/event/24/contributions/293/ LOCATION: URL:https://indico.unina.it/event/24/contributions/293/ END:VEVENT BEGIN:VEVENT SUMMARY:V. Gebhart - Quantifying speedup in Grover’s search algorithm by multipartite entanglement DTSTART;VALUE=DATE-TIME:20190918T135000Z DTEND;VALUE=DATE-TIME:20190918T141000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-292@cern.ch DESCRIPTION:We discuss the intimate connection between the quantum speedup of the (pseudo-)pure state Grover algorithm and the detection of multipar tite entanglement using the Quantum Fisher Information (QFI). The quantum speedup is proportional to the maximal QFI during the algorithm\, and henc e proportional to the thereby detected k-partite entanglement. For small p urities\, speed-up still persists even though no entanglement is detected\ , however\, the QFI still remains a quanfitier of the speed-up.\n\nhttps:/ /indico.unina.it/event/24/contributions/292/ LOCATION: URL:https://indico.unina.it/event/24/contributions/292/ END:VEVENT BEGIN:VEVENT SUMMARY:A. Shafiei Aporvari- Cavity optomechanics DTSTART;VALUE=DATE-TIME:20190918T133000Z DTEND;VALUE=DATE-TIME:20190918T135000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-291@cern.ch DESCRIPTION:In this work we are going to study cavity optomechanical syste ms where the coupling between electromagnetic radiation and mechanical mot ion is considered. In this fast-growing field\, the interaction of radiati on field with the vibrational motions of a mechanical oscillator has many promising applications such as precision force sensing and evaluations of quantum physics at macroscopic scales. The standard and simplest optomecha nical setup is a Fabry-Perot cavity in which one of the two mirrors is a v ibrating micromechanical object. In fact\, it has been the first experimen tally studied cavity optomechanical system. It is also possible to place a mechanical element inside the optical cavity such as a flexible membrane which could be exploited for applications such as quantum detection of wea k forces\, displacements\, masses\, and accelerations. In this research\, our main aim is to perform a quantum theoretical analysis on the power-noi se spectrum by considering the phase measurements in a cavity optomechanic s setup involving a coherently driven membrane in the middle of the cavity . In other words\, mechanical motion of the system is studied by monitorin g the phase of the optical cavity output.\n\nhttps://indico.unina.it/event /24/contributions/291/ LOCATION: URL:https://indico.unina.it/event/24/contributions/291/ END:VEVENT BEGIN:VEVENT SUMMARY:Pratibha Raghupati Hegde - An evolutionary strategy for finding ef fective quantum 2-body Hamiltonians of p-body interacting systems DTSTART;VALUE=DATE-TIME:20190917T155000Z DTEND;VALUE=DATE-TIME:20190917T161000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-286@cern.ch DESCRIPTION:Quantum annealing can be used to solve optimization prob-\nlem s. Quantum processors\, performing quantum annealing\, operate mini-\nmizi ng a cost function. The central issue is to map the cost function which\nh as p-body interactions into a function with at most 2-body interactions.\n In the already existing method of minor embedding\, xing the number of\nan cillae qubits for highly interacting models becomes impractical. Here\nwe propose a technique for obtaining approximate mapping based on ge-\nnetic algorithms. We verify the feasibility of this procedure by mapping\nferrom agnetic p-spin model in two analytically solvable cases.\n\nBased on the m anuscript submitted to the journal of Quantum Machine Intelligence-\nPassa relli\, G. et. al\, An evolutionary strategy for nding eective quantum 2-b ody\nHamiltonians of p-body interacting systems.\n\nhttps://indico.unina.i t/event/24/contributions/286/ LOCATION: URL:https://indico.unina.it/event/24/contributions/286/ END:VEVENT BEGIN:VEVENT SUMMARY:G.P.Pepe - Physics and Applications of Superconducting Nanowire Si ngle-Photon Detectors DTSTART;VALUE=DATE-TIME:20190916T160000Z DTEND;VALUE=DATE-TIME:20190916T173000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-179@cern.ch DESCRIPTION:Superconducting Nanowire Single-Photon Detectors (SNSPD) are v ery interesting for their overall performances in terms of system quantum detection efficiency\, high maximum counting speeds achieved at wavelength s up to near-IR\, ultra low darkcounts and very short jitter times.In this lesson we'll present the operation principle of SNSPDs\, the fabrication processes and the various approaches followed for both optical coupling an d electrinic read-out. The use of SNSPDs in some quantum applications will be also presented and discussed.\n\nhttps://indico.unina.it/event/24/cont ributions/179/ LOCATION: URL:https://indico.unina.it/event/24/contributions/179/ END:VEVENT BEGIN:VEVENT SUMMARY:A. Di Pierro - Introduction to Quantum Programming (part 2) DTSTART;VALUE=DATE-TIME:20190921T090000Z DTEND;VALUE=DATE-TIME:20190921T103000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-196@cern.ch DESCRIPTION:Quantum programming languages have been introduced\nabout twen ty years ago mainly from a theoretical\nperspective. Nowadays\, several ef forts have been devoted to\nthe construction of real quantum architectures . We can\ntherefore map the theoretical findings into concrete\nprogrammin g platforms.\nIn this lecture\, we will introduce the notions at the basis of\nhigh-level quantum programming and show some examples\nof quantum pro grams by using existing platforms.\n\nhttps://indico.unina.it/event/24/con tributions/196/ LOCATION: URL:https://indico.unina.it/event/24/contributions/196/ END:VEVENT BEGIN:VEVENT SUMMARY:A. Di Pierro - Introduction to Quantum Programming (part 1) DTSTART;VALUE=DATE-TIME:20190921T070000Z DTEND;VALUE=DATE-TIME:20190921T083000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-195@cern.ch DESCRIPTION:Quantum programming languages have been introduced\nabout twen ty years ago mainly from a theoretical\nperspective. Nowadays\, several ef forts have been devoted to\nthe construction of real quantum architectures . We can\ntherefore map the theoretical findings into concrete\nprogrammin g platforms.\nIn this lecture\, we will introduce the notions at the basis of\nhigh-level quantum programming and show some examples\nof quantum pro grams by using existing platforms.\n\nhttps://indico.unina.it/event/24/con tributions/195/ LOCATION: URL:https://indico.unina.it/event/24/contributions/195/ END:VEVENT BEGIN:VEVENT SUMMARY:A. Acin - Device-independent quantum information processing DTSTART;VALUE=DATE-TIME:20190920T140000Z DTEND;VALUE=DATE-TIME:20190920T153000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-193@cern.ch DESCRIPTION:Device-independent quantum information processing represents a new framework for quantum information applications in which devices are s een as black boxes processing classical information. In particular\, no as sumptions are made on the inner working of these devices except their quan tum functioning. The lecture introduces the main ideas and tools of the de vice-independent scenario and argues why it is especially relevant for qua ntum cryptography applications.\n\nhttps://indico.unina.it/event/24/contri butions/193/ LOCATION: URL:https://indico.unina.it/event/24/contributions/193/ END:VEVENT BEGIN:VEVENT SUMMARY:S. Poletto - Engineering superconducting transmon qubits (part 2) DTSTART;VALUE=DATE-TIME:20190920T090000Z DTEND;VALUE=DATE-TIME:20190920T103000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-192@cern.ch DESCRIPTION:In this series of lectures I will describe how superconducting transmon\nqubits are engineered\, designed\, and fabricated.\n\nI start i ntroducing the building blocks of superconducting quantum\nprocessors from an engineering point of view\, with a focus on working\nparameters and de sign considerations. I will emphasize similarities with\nstandard microwav e engineer elements such as transmission lines\,\nresonators\, and capacit ive or inductive couplings.\n\nI will provide a deep insight on how the wo rking parameters of the quantum\nprocessor are linked to the performances of the device and to the lifetime\nof the qubits.\n\nI will conclude with an overview of the common fabrication techniques to\nproduce superconducti ng quantum processors.\n\nAt the end of this series of lectures the audien ce will be familiar with\nequations and tools used to engineer superconduc ting transmon quantum\nprocessors. Moreover\, they will know how to balanc e the tradeoff between\nperformances and coherence times imposed at the de sign stage.\n\nhttps://indico.unina.it/event/24/contributions/192/ LOCATION: URL:https://indico.unina.it/event/24/contributions/192/ END:VEVENT BEGIN:VEVENT SUMMARY:S. Poletto - Engineering superconducting transmon qubits (part 1) DTSTART;VALUE=DATE-TIME:20190919T133000Z DTEND;VALUE=DATE-TIME:20190919T150000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-189@cern.ch DESCRIPTION:In this series of lectures I will describe how superconducting transmon\nqubits are engineered\, designed\, and fabricated.\n\nI start i ntroducing the building blocks of superconducting quantum\nprocessors from an engineering point of view\, with a focus on working\nparameters and de sign considerations. I will emphasize similarities with\nstandard microwav e engineer elements such as transmission lines\,\nresonators\, and capacit ive or inductive couplings.\n\nI will provide a deep insight on how the wo rking parameters of the quantum\nprocessor are linked to the performances of the device and to the lifetime\nof the qubits.\n\nI will conclude with an overview of the common fabrication techniques to\nproduce superconducti ng quantum processors.\n\nAt the end of this series of lectures the audien ce will be familiar with\nequations and tools used to engineer superconduc ting transmon quantum\nprocessors. Moreover\, they will know how to balanc e the tradeoff between\nperformances and coherence times imposed at the de sign stage.\n\nhttps://indico.unina.it/event/24/contributions/189/ LOCATION: URL:https://indico.unina.it/event/24/contributions/189/ END:VEVENT BEGIN:VEVENT SUMMARY:D. Esteve - Superconducting Quantum Bits and Hybrid Spin Supercond ucting Circuits for Quantum Technologies DTSTART;VALUE=DATE-TIME:20190920T070000Z DTEND;VALUE=DATE-TIME:20190920T083000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-191@cern.ch DESCRIPTION:In the domain of electrical circuits\, superconducting quantum bits based on Josephson junctions are presently the most advanced qubits. I will describe the single Cooper pair box circuit\, its transmon version used nowadays\, and the operation of an elementary quantum processor. I w ill explain the scalability challenge required by quantum error correction \, and the alternative routes for facing it. We are developing such an alt ernative hybrid route based on spins with superior quantum coherence coupl ed to quantum superconducting circuits. I will present the progress achiev ed in the control of a small number of electronic spins for performing ult ra-sensitive Electronic Spin Resonance\, and the perspectives open for qua ntum information processing.\n\nhttps://indico.unina.it/event/24/contribut ions/191/ LOCATION: URL:https://indico.unina.it/event/24/contributions/191/ END:VEVENT BEGIN:VEVENT SUMMARY:D. Esteve - From Dynamical Coulomb Blockade in Josephson Junctions to Non-Classical Microwave Sources DTSTART;VALUE=DATE-TIME:20190919T070000Z DTEND;VALUE=DATE-TIME:20190919T083000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-187@cern.ch DESCRIPTION:This lecture considers a Josephson junction in series with an impedance voltage biased below the gap. In this simple quantum electrodyna mics system\, the coupling constant between Cooper pair tunneling and each mode of the impedance is determined by the ratio between the mode impedan ce Z=√(L/C) and the relevant resistance quantum RQ= h/(2e)2 ~6.5 kOhms. A series of interesting situations that have been investigated will be con sidered in this lecture.\nIn the simplest case of a single mode resonator\ , the transfer of a single Cooper pair only occurs when its energy 2eV can be transformed in 1\,2\,..n photonic excitations in the resonator. This i nelastic tunneling phenomenon is the essence of Dynamical Coulomb Blockade . In the strong coupling regime\, the presence of a single photon can even block the creation of a second one\, which forces the resonator to emit a single photon in the external circuit before another Cooper pair can pass and re-excite it. One gets this way a very simple single photon source.\n In a two-mode resonator circuit with different frequencies\, the transfer of a single Cooper pair can simultaneously excite a single photonic excita tion in each mode. The photons leaking out of the resonators in the measur ement lines are then entangled. In the particular case of two resonators r espectively with a high (low) Q\, the stabilization of a single excitation Fock state in the high Q resonator can furthermore be achieved.\nApplicat ions are sought for these non-classical sources of radiation in the microw ave domain that could be extended up to the THz frequency range.\n\nhttps: //indico.unina.it/event/24/contributions/187/ LOCATION: URL:https://indico.unina.it/event/24/contributions/187/ END:VEVENT BEGIN:VEVENT SUMMARY:F. Scazza - Ultracold atomic Fermi gases in the strongly correlate d regime (part 2) DTSTART;VALUE=DATE-TIME:20190919T090000Z DTEND;VALUE=DATE-TIME:20190919T103000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-188@cern.ch DESCRIPTION:Ultracold atomic gases provide a formidable platform for quant um simulation of a variety of models initially introduced in condensed mat ter physics or other areas. One of the most promising applications of quan tum simulation is the study of strongly correlated Fermi gases\, for which accurate theoretical predictions are challenging even with state-of-the-a rt approaches. In this lecture\, I will first briefly review the foundatio ns of atom-light interactions and explain how these are exploited to cool\ , trap and manipulate atoms. I will then introduce ultracold atomic Fermi gases\, from the non-interacting case to the famous strongly correlated BE C-BCS crossover. I will also describe some recent experiments\, highlighti ng the unique and fascinating aspects of crossover superfluids. In the sec ond part of the lecture\, I will present a general introduction to the Fer mi-Hubbard model and outline its realization with ultracold fermions in op tical lattices\, highlighting the foremost experimental achievements so fa r. To conclude\, I will shortly discuss some novel approaches to quantum s imulation of quantum magnetism and long-range interacting systems.\n\nhttp s://indico.unina.it/event/24/contributions/188/ LOCATION: URL:https://indico.unina.it/event/24/contributions/188/ END:VEVENT BEGIN:VEVENT SUMMARY:F. Scazza - Ultracold atomic Fermi gases in the strongly correlate d regime (part 1) DTSTART;VALUE=DATE-TIME:20190918T090000Z DTEND;VALUE=DATE-TIME:20190918T103000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-184@cern.ch DESCRIPTION:Ultracold atomic gases provide a formidable platform for quant um simulation of a variety of models initially introduced in condensed mat ter physics or other areas. One of the most promising applications of quan tum simulation is the study of strongly correlated Fermi gases\, for which accurate theoretical predictions are challenging even with state-of-the-a rt approaches. In this lecture\, I will first briefly review the foundatio ns of atom-light interactions and explain how these are exploited to cool\ , trap and manipulate atoms. I will then introduce ultracold atomic Fermi gases\, from the non-interacting case to the famous strongly correlated BE C-BCS crossover. I will also describe some recent experiments\, highlighti ng the unique and fascinating aspects of crossover superfluids. In the sec ond part of the lecture\, I will present a general introduction to the Fer mi-Hubbard model and outline its realization with ultracold fermions in op tical lattices\, highlighting the foremost experimental achievements so fa r. To conclude\, I will shortly discuss some novel approaches to quantum s imulation of quantum magnetism and long-range interacting systems.\n\nhttp s://indico.unina.it/event/24/contributions/184/ LOCATION: URL:https://indico.unina.it/event/24/contributions/184/ END:VEVENT BEGIN:VEVENT SUMMARY:M. Bellini - Generation\, manipulation\, and detection of continuo us-variable quantum states of light (part 2) DTSTART;VALUE=DATE-TIME:20190917T133000Z DTEND;VALUE=DATE-TIME:20190917T150000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-181@cern.ch DESCRIPTION:I will introduce the basic concepts and provide real experimen tal examples of quantum state engineering and measurement\, with special e mphasis to continuous-variable quantum optical states of light. The first lecture will introduce fundamental ideas and describe the basic tools\, su ch as parametric down-conversion processes and balanced homodyne detection \, for the manipulation and complete characterization of a quantum light f ield. The second lecture will be devoted to presenting some advanced appli cations to a variety of nonclassical states of light\, with illustrations of the most fundamental concepts of quantum mechanics at play in the labor atory.\n\nhttps://indico.unina.it/event/24/contributions/181/ LOCATION: URL:https://indico.unina.it/event/24/contributions/181/ END:VEVENT BEGIN:VEVENT SUMMARY:M. Bellini - Generation\, manipulation\, and detection of continuo us-variable quantum states of light (part 1) DTSTART;VALUE=DATE-TIME:20190916T140000Z DTEND;VALUE=DATE-TIME:20190916T153000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-177@cern.ch DESCRIPTION:I will introduce the basic concepts and provide real experimen tal examples of quantum state engineering and measurement\, with special e mphasis to continuous-variable quantum optical states of light. The first lecture will introduce fundamental ideas and describe the basic tools\, su ch as parametric down-conversion processes and balanced homodyne detection \, for the manipulation and complete characterization of a quantum light f ield. The second lecture will be devoted to presenting some advanced appli cations to a variety of nonclassical states of light\, with illustrations of the most fundamental concepts of quantum mechanics at play in the labor atory.\n\nhttps://indico.unina.it/event/24/contributions/177/ LOCATION: URL:https://indico.unina.it/event/24/contributions/177/ END:VEVENT BEGIN:VEVENT SUMMARY:S. Pilati - Adiabatic quantum computing and simulated quantum anne aling (part 2) DTSTART;VALUE=DATE-TIME:20190917T070000Z DTEND;VALUE=DATE-TIME:20190917T083000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-180@cern.ch DESCRIPTION:I will introduce some elements of adiabatic quantum computing\ , with special focus on approaches that aim to solve hard combinatorial op timization problems via quantum annealing. The main features of currently commercialized quantum annealing devices will be described.\nI will provid e some notions concerning quantum Monte Carlo algorithms and discuss how t hese simulation techniques are being use as a benchmark for quantum anneal ers and as a tool to inspect if and when a quantum quantum annealing devic es might display a quantum speed-up compared to classical optimization met hods.\n\nhttps://indico.unina.it/event/24/contributions/180/ LOCATION: URL:https://indico.unina.it/event/24/contributions/180/ END:VEVENT BEGIN:VEVENT SUMMARY:V. Parigi - Multimode quantum optics in Continuous Variables Quant um Information technologies DTSTART;VALUE=DATE-TIME:20190916T070000Z DTEND;VALUE=DATE-TIME:20190916T083000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-175@cern.ch DESCRIPTION:In the continuous variables (CV) approach\, universal computat ion can be identified via a universal set of Hamiltonians\, able to genera te any arbitrary evolution as a combination of finite-time Hamiltonian uni taries\, including Gaussian and non-Gaussian interaction - which are not e asy to realise in an optical implementation. Differently form the discrete variables (DV) approach the two-modes entangling gate in the CV encoding is a Gaussian gate which can be implemented by combination of squeezing an d linear optics. This has as consequence that the CV approach is particula rly suitable for the one-way model of quantum computing based on cluster s tate. I will revise experimental generation of multimode quantum states fo r CV protocols and in particular the one based on optical frequency combs and parametric processes. The protocols\, along with mode selective and mu ltimode homodyne measurements\, allow for the implementation of reconfigur able entanglement connections between the involved. This can be exploited for fabricating entanglement structures with regular geometry as cluster s tates or graphs with more complex topology which can emulate quantum physi cal systems in complex structures or quantum protocols in complex networks . I will also revise non-Gaussian operations\, which are necessaries to re ach a form of quantum advantage in this scenario\n\nhttps://indico.unina.i t/event/24/contributions/175/ LOCATION: URL:https://indico.unina.it/event/24/contributions/175/ END:VEVENT BEGIN:VEVENT SUMMARY:closing DTSTART;VALUE=DATE-TIME:20190921T103000Z DTEND;VALUE=DATE-TIME:20190921T110000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-197@cern.ch DESCRIPTION:https://indico.unina.it/event/24/contributions/197/ LOCATION: URL:https://indico.unina.it/event/24/contributions/197/ END:VEVENT BEGIN:VEVENT SUMMARY:A. Mezzacapo - Querying quantum computers via neural network DTSTART;VALUE=DATE-TIME:20190920T160000Z DTEND;VALUE=DATE-TIME:20190920T173000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-194@cern.ch DESCRIPTION:We show how the use of neural networks can help augmenting the \nprecision of observables estimation on a quantum computer\, addressing\n one of the main challenges of short-depth algorithms.\n\nhttps://indico.un ina.it/event/24/contributions/194/ LOCATION: URL:https://indico.unina.it/event/24/contributions/194/ END:VEVENT BEGIN:VEVENT SUMMARY:A. Mezzacapo - Loading and solving fermionic problems on quantum c omputers DTSTART;VALUE=DATE-TIME:20190919T161000Z DTEND;VALUE=DATE-TIME:20190919T174000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-190@cern.ch DESCRIPTION:We show how to express fermionic problems in qubit language\, exploring\ndifferent techniques. We then expose the limitations of current state\nof the art quantum computers in solving correlated fermionic syste ms\nsuch as molecular models.\n\nhttps://indico.unina.it/event/24/contribu tions/190/ LOCATION: URL:https://indico.unina.it/event/24/contributions/190/ END:VEVENT BEGIN:VEVENT SUMMARY:G. Mazzola - Applications for the noisy and intermediate scale era of quantum computing (part 1) DTSTART;VALUE=DATE-TIME:20190918T070000Z DTEND;VALUE=DATE-TIME:20190918T083000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-183@cern.ch DESCRIPTION:I review the most promising quantum algorithms and application s suitable for existing and near futures devices. I present results concer ning proof-of-principle calculations on IBM hardwares ranging from combina torial optimization (e.g. protein folding)\, electronic structure (e.g. ch emistry and condensed matter)\, and sampling (useful for financial applica tions).\n\nhttps://indico.unina.it/event/24/contributions/183/ LOCATION: URL:https://indico.unina.it/event/24/contributions/183/ END:VEVENT BEGIN:VEVENT SUMMARY:F. Cataliotti - soft skills (part 2) DTSTART;VALUE=DATE-TIME:20190917T161000Z DTEND;VALUE=DATE-TIME:20190917T174000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-182@cern.ch DESCRIPTION:https://indico.unina.it/event/24/contributions/182/ LOCATION: URL:https://indico.unina.it/event/24/contributions/182/ END:VEVENT BEGIN:VEVENT SUMMARY:F. Cataliotti - soft skills (part 1) DTSTART;VALUE=DATE-TIME:20190917T090000Z DTEND;VALUE=DATE-TIME:20190917T103000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-178@cern.ch DESCRIPTION:https://indico.unina.it/event/24/contributions/178/ LOCATION: URL:https://indico.unina.it/event/24/contributions/178/ END:VEVENT BEGIN:VEVENT SUMMARY:S. Pilati - Adiabatic quantum computing and simulated quantum anne aling (part 1) DTSTART;VALUE=DATE-TIME:20190916T090000Z DTEND;VALUE=DATE-TIME:20190916T103000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-176@cern.ch DESCRIPTION:I will introduce some elements of adiabatic quantum computing\ , with special focus on approaches that aim to solve hard combinatorial op timization problems via quantum annealing. The main features of currently commercialized quantum annealing devices will be described.\nI will provid e some notions concerning quantum Monte Carlo algorithms and discuss how t hese simulation techniques are being use as a benchmark for quantum anneal ers and as a tool to inspect if and when a quantum quantum annealing devic es might display a quantum speed-up compared to classical optimization met hods.\n\nhttps://indico.unina.it/event/24/contributions/176/ LOCATION: URL:https://indico.unina.it/event/24/contributions/176/ END:VEVENT BEGIN:VEVENT SUMMARY:welcome DTSTART;VALUE=DATE-TIME:20190916T063000Z DTEND;VALUE=DATE-TIME:20190916T065500Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-174@cern.ch DESCRIPTION:https://indico.unina.it/event/24/contributions/174/ LOCATION: URL:https://indico.unina.it/event/24/contributions/174/ END:VEVENT BEGIN:VEVENT SUMMARY:arrival and registration DTSTART;VALUE=DATE-TIME:20190915T160000Z DTEND;VALUE=DATE-TIME:20190915T173000Z DTSTAMP;VALUE=DATE-TIME:20260417T180520Z UID:indico-contribution-24-173@cern.ch DESCRIPTION:https://indico.unina.it/event/24/contributions/173/ LOCATION: URL:https://indico.unina.it/event/24/contributions/173/ END:VEVENT END:VCALENDAR