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SUMMARY:Unconventional superconducting devices and designs for quantum arc
 hitectures
DTSTART;VALUE=DATE-TIME:20211012T094500Z
DTEND;VALUE=DATE-TIME:20211012T101000Z
DTSTAMP;VALUE=DATE-TIME:20260907T151633Z
UID:indico-contribution-79-411@cern.ch
DESCRIPTION:Speakers: Davide Massarotti (Università Federico II)\nWe will
  report on special properties of smart superconducting circuits and of hyb
 rid tunnel-ferromagnetic Josephson junctions (JJs) on how to engineer the 
 macroscopic phase in quantum circuits.\n\nThe possibility to control and d
 rive tunnel-ferromagnetic JJs through different physical means allows for 
 novel tuning mechanisms that are not susceptible to specific noise sources
  in a transmon configuration. Moreover\, digital control based on classica
 l superconducting ultra-low power electronics is being adapted to perform 
 qubit control and readout for scalable architectures in this linked digita
 l-quantum hybrid system. In this framework\, we will discuss how the macro
 scopic phase of carefully designed superconducting circuits can be manipul
 ated to perform digital phase detection of weak coherent radiation\, thus 
 constituting a phase-readout protocol for a superconducting qubit.\n\nhttp
 s://indico.unina.it/event/52/contributions/411/
LOCATION:
URL:https://indico.unina.it/event/52/contributions/411/
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BEGIN:VEVENT
SUMMARY:Thermal rectification through a nonlinear quantum resonator
DTSTART;VALUE=DATE-TIME:20211012T103500Z
DTEND;VALUE=DATE-TIME:20211012T110000Z
DTSTAMP;VALUE=DATE-TIME:20260907T151633Z
UID:indico-contribution-79-389@cern.ch
DESCRIPTION:Speakers: Elisabetta Paladino (Dipartimento di Fisica e Astron
 omia\, Università di Catania)\nWe present a systematic study of thermal r
 ectification\, R\, in a nonlinear resonator. In the strongly anharmonic re
 gime and weak system-bath coupling we derive general upper bounds on R. Be
 yond the weak-coupling regime we employ different methods: (i) including c
 otunneling processes\, using (ii) nonequilibrium Green’s function formal
 ism and (iii) Feynman-Vernon path integral approach. We find that the weak
  coupling bounds are violated for strong coupling\, providing signatures o
 f high-order coherent processes. For weaker anharmonicity heat rectificati
 on is calculated with the equation of motion method and in mean-field appr
 oximation. We find that the former method predicts\, for small or intermed
 iate anharmonicity larger R.\n\nB. Bhandari\, P. A. Erdman\, R. Fazio\, E.
  Paladino and F. Taddei Phys. Rev. B 103\, 155434 (2021)\n\nhttps://indico
 .unina.it/event/52/contributions/389/
LOCATION:
URL:https://indico.unina.it/event/52/contributions/389/
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BEGIN:VEVENT
SUMMARY:Tensor network algorithms for high-dimensional quantum many-body s
 ystems
DTSTART;VALUE=DATE-TIME:20211012T101000Z
DTEND;VALUE=DATE-TIME:20211012T103500Z
DTSTAMP;VALUE=DATE-TIME:20260907T151633Z
UID:indico-contribution-79-388@cern.ch
DESCRIPTION:Speakers: Simone Montangero ()\nWe review some recent results 
 on the development of tensor network algorithms and their application to\n
 high-dimensional many-body quantum systems and machine learning problems i
 n High Energy Physics. In particular\, we present results on\ntopological 
 two-dimensional systems\, two dimensional Rydberg atom systems\, and two a
 nd three-dimensional lattice gauge theories in presence of fermonic matter
 .\nFinally\, we present their application to LHCb event classification and
  to the study of open many-body quantum systems\, specifically to the comp
 utation of the\nentanglement of formation in critical many-body quantum sy
 stems at finite temperature.\n\nhttps://indico.unina.it/event/52/contribut
 ions/388/
LOCATION:
URL:https://indico.unina.it/event/52/contributions/388/
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BEGIN:VEVENT
SUMMARY:Robust engineering of universal Gaussian cluster states for contin
 uous variable measurement-based quantum computation
DTSTART;VALUE=DATE-TIME:20211012T092000Z
DTEND;VALUE=DATE-TIME:20211012T094500Z
DTSTAMP;VALUE=DATE-TIME:20260907T151633Z
UID:indico-contribution-79-426@cern.ch
DESCRIPTION:Speakers: David Vitali (Università di Camerino)\nWe first sho
 w that any Gaussian cluster state of N bosonic modes can be generated by a
  multi-mode squeezing transformation. and provide the explicit recipe. We 
 then use this result to show that a large class of pure entangled CV Gauss
 ian states\, including 2D-cluster states\, can be robustly generated as a 
 unique steady state of a dissipative dynamics employing minimal resources.
  In fact\, this is achievable using only a single-site squeezed driving an
 d passive bilinear interactions. We provide the explicit protocol which co
 rresponds to the engineering of a suitable excitation number conserving Ha
 miltonian.This fact can be used for the implementation of universal contin
 uous variable measurement-based-quantum computation on various platforms.\
 n\nhttps://indico.unina.it/event/52/contributions/426/
LOCATION:
URL:https://indico.unina.it/event/52/contributions/426/
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