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DTSTART;TZID=Europe/Paris:20240711T140000
DTEND;TZID=Europe/Paris:20240711T153000
DTSTAMP:20260418T083842
CREATED:20240704T054950Z
LAST-MODIFIED:20240708T120000Z
UID:10901-1720706400-1720711800@fermi.univ-tlse3.fr
SUMMARY:Description exacte du transport dans les résistances stochastiques quantiques et les dispositifs contrôlés. - (Michele Filippone / LPT / Seminar). - 11/07/2024\, 14H
DESCRIPTION:Michele Filippone (CEA Grenoble) \nSeminar LPT\, 11/07/2024\, 14H\, 3R1\, seminar room\, 3rd floor \nAbstract : \n\nUnderstanding the emergence of diffusion in quantum systems remains a challenging problem in theoretical physics. An extended class of models expected to exhibit diffusive behavior is given by Quantum Stochastic Hamiltonians (QSHs)\, which describe lattice models affected by time- and space-dependent noise. However\, the averaged dynamics of such models are governed by non-linear Lindblad equations\, whose theoretical study usually relies on numerical methods or case-by-case solutions\, with strong constraints on geometries and driving protocols. \nIn this talk\, I will present a systematic method to derive exact and analytical solutions for the stationary quantum transport of QSHs in arbitrary configurations [1]. Our solution is based on an exact self-consistent Born scheme for diagrammatics in the Keldysh representation [2]. We show that most QSHs behave as diffusive « quantum stochastic resistors\, » whose properties are encoded in the Keldysh component of the single-particle Green’s function. I will provide a semi-classical interpretation of such systems [3]\, and in particular\, I will discuss how our exact solution demonstrates the validity of a new perturbation scheme in the inverse system size\, named the 1/N expansion\, to study out-of-equilibrium diffusive/ohmic systems. \nI will conclude by discussing how our approach can be extended to describe quantum transport in continuously monitored settings. I will show that measurements trigger non-reciprocal currents in quantum devices\, thus acting as a resource for power generation and quantum measurement cooling [4]. \n\n[1] T. Jin\, J. S. Ferreira\, M. Filippone\, T. Giamarchi\, Physical Review Research 4\, 013109 (2022)\n[2] P. E. Dolgirev\, J. Marino\, D. Sels\, E. Demler\, Physical Review B 102\, 100301 (2020)\n[3] T. Jin\, J. S. Ferreira\, M. Filippone\, T. Giamarchi\, Physical Review Research 5\, 013033 (2023)\n[4] J. S. Ferreira\, T. Jin\, J. Mannhart\, T. Giamarchi\, M. Filippone\, Physical Review Letters 132\, 136301 (2024) – Editors’ Suggestion\n\n\n \n
URL:https://fermi.univ-tlse3.fr/event/description-exacte-du-transport-dans-les-resistances-stochastiques-quantiques-et-les-dispositifs-controles-michele-filippone-lpt-seminar-9-07-2024-14h/
LOCATION:salle de séminaire 3ème étage\, Bâtiment 3r1 Université Toulouse III\, Toulouse\, 31400\, France
CATEGORIES:Events,LPT,Seminars
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