BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:New applications of twin beams: from quantum reading to quantum co nformance test DTSTART;VALUE=DATE-TIME:20211012T083000Z DTEND;VALUE=DATE-TIME:20211012T085500Z DTSTAMP;VALUE=DATE-TIME:20260818T014732Z UID:indico-contribution-85-386@cern.ch DESCRIPTION:Speakers: MARCO GENOVESE (inrim)\nWe present quantum reading [ 3] realisation\, describing theoretically and experimentally\, as that qua ntum advantage is obtained by practical photon-counting measurements combi ned with a simple maximum-likelihood decision [4]\, demonstrating that qua ntum entanglement and simple optics are able to enhance the readout of dig ital data.\nThen we consider [5] a protocol on conformance test. We formu late the problem in the context of quantum hypothesis demonstrating that q uantum resources\, namely twin beams [1\,2]\, and a simple receive are abl e to outperform any classical strategy in recognizing whether or not a cer tain quantum channel conforms to a reference one.\n[1] M.Genovese\,J.Opt.1 8 (2016) 073002.\n[2] M.Genovese\, arXiv2101.02891\n[3] S. Pirandola\, PRL 106\, 090504 (2011).\n[4] G.Ortolano et al. Sci.Adv.(2021) 7\, eabc7796.\n [5] G.Ortolano et al.arXiv:2012.15282\n\nhttps://indico.unina.it/event/52/ contributions/386/ LOCATION: URL:https://indico.unina.it/event/52/contributions/386/ END:VEVENT BEGIN:VEVENT SUMMARY:Towards the detection of quantum light in the mid-infrared DTSTART;VALUE=DATE-TIME:20211012T080500Z DTEND;VALUE=DATE-TIME:20211012T083000Z DTSTAMP;VALUE=DATE-TIME:20260818T014732Z UID:indico-contribution-85-385@cern.ch DESCRIPTION:Speakers: Natalia Bruno (Istituto Nazionale di Ottica (CNR-INO )\, Largo Enrico Fermi 6\, 50125 Florence\, Italy & European Laboratory fo r Non-linear Spectroscopy (LENS)\, Via nello Carrara 1\, 50019 Sesto Fiore ntino\, Florence\, Italy)\nQuantum Cascade Laser (QCL) frequency combs cou ld emit nonclassical light and multimode entanglement thanks to a third or der nonlinearity that allows for Four Wave Mixing in the device (Faist 201 6)\, which makes them ideal candidates for free-space communication applic ations.\nHowever\, in the mid-infrared\, the lack of efficient and low-noi se detectors compromises enormously the ability to investigate non classic al features of light. In addition\, the laser gain of the device itself ca n introduce noise due to the amplification. Having a signature of non clas sical light\, such as squeezing\, is a challenging task in these condition s. We demonstrate the possibility of investigating continuous-variable qua ntum physics in the mid-infrared through a novel Balanced Homodyne Detecto r (Gabbrielli 2021)\, tested with QCLs.\n\nhttps://indico.unina.it/event/5 2/contributions/385/ LOCATION: URL:https://indico.unina.it/event/52/contributions/385/ END:VEVENT BEGIN:VEVENT SUMMARY:A hybrid classical-quantum approach to improve Q-learning DTSTART;VALUE=DATE-TIME:20211012T074000Z DTEND;VALUE=DATE-TIME:20211012T080500Z DTSTAMP;VALUE=DATE-TIME:20260818T014732Z UID:indico-contribution-85-384@cern.ch DESCRIPTION:Speakers: Francesco Plastina (Dip. Fisica UNICAL - INFN Gruppo Collegato di Cosenza)\nA classical-quantum hybrid approach to computation is presented\, allogwing for a (quadratic) performance improvement in the learning stage of a neural network. In particular\, a quantum computing r outine is described\, which helps to prepare/update the probability distri butions that drive the agent operations. This algorithm can be used not on ly in a reinforcement learning scenario\, but also in several other contex ts. After intrudicing the algorithm and presenting a formal evaluation of its performance (in terms of required qubits\, number of required operatio ns\, and maximum approximation error)\, the way it can be exploited in a r einforcement learning set-up is discussed in details.\n\nhttps://indico.un ina.it/event/52/contributions/384/ LOCATION: URL:https://indico.unina.it/event/52/contributions/384/ END:VEVENT BEGIN:VEVENT SUMMARY:Quantum Energy Lines and the optimal output ergotropy problem DTSTART;VALUE=DATE-TIME:20211012T071500Z DTEND;VALUE=DATE-TIME:20211012T074000Z DTSTAMP;VALUE=DATE-TIME:20260818T014732Z UID:indico-contribution-85-383@cern.ch DESCRIPTION:Speakers: Salvatore Tirone (Scuola Normale Superiore)\nWe stud y the possibility of conveying useful energy (work) along a transmission line that allows for a partial preservation of quantum coherence. As a fig ure of merit we adopt the maximum values that ergotropy\, total ergotrop y\, and non-equilibrium free-energy attain at the output of the line for a n assigned input energy threshold. When the system can be modelled in term s of Phase-Invariant Bosonic Gaussian Channels (BGCs)\, we show that coher ent inputs are optimal. For generic BGCs which are not Phase-Invariant the problem becomes more complex and coherent inputs are no longer optimal. I n this case\, focusing on one-mode channels\, we solve the optimization pr oblem under the extra restriction of Gaussian input signals.\n\nhttps://in dico.unina.it/event/52/contributions/383/ LOCATION: URL:https://indico.unina.it/event/52/contributions/383/ END:VEVENT BEGIN:VEVENT SUMMARY:Optimal energy conversion through anti-adiabatic driving DTSTART;VALUE=DATE-TIME:20211012T065000Z DTEND;VALUE=DATE-TIME:20211012T071500Z DTSTAMP;VALUE=DATE-TIME:20260818T014732Z UID:indico-contribution-85-369@cern.ch DESCRIPTION:Speakers: Giuliano Benenti (Dip. Scienze Alta Tecnologia\, Uni v. Insubria\, Como\, Italy)\nA key question for the development of quantum thermos-machines and more generally of quantum technologies is what are t he ultimate bounds to the performance of heat engines. We have shown [1] t hat in the antiadiabatic limit a periodically driven isothermal heat engin e can approach the ideal (unit) energy conversion efficiency with finite o utput power and vanishingly small relative power fluctuations. The simulta neous realization of all three desiderata of a heat engine is possible tha nks to the breaking of time-reversal symmetry. Moreover\, non-Markovian dy namics\, obtained by suitably engineering the bath\, can further improve t he power-efficiency trade-off.\n\n[1] L. M. Cangemi\, M. Carrega\, A. De C andia\, V. Cataudella\, G. De Filippis\, M. Sassetti\, and G. Benenti\, Ph ys. Rev. Res. ***3***\, 013237 (2021).\n\nhttps://indico.unina.it/event/52 /contributions/369/ LOCATION: URL:https://indico.unina.it/event/52/contributions/369/ END:VEVENT END:VCALENDAR