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Quantum Physics
Title: Quasiprobability distribution of work in the quantum Ising model
(Submitted on 22 Feb 2023 (v1), last revised 19 Jun 2023 (this version, v3))
Abstract: A complete understanding of the statistics of the work done by quenching a parameter of a quantum many-body system is still lacking in the presence of an initial quantum coherence in the energy basis. In this case, the work can be represented by a class of quasiprobability distributions. Here, we try to clarify the genuinely quantum features of the process by studying the work quasiprobability for an Ising model in a transverse field. We consider both a global and a local quench, by focusing mainly on the thermodynamic limit. We find that, while for a global quench there is a symmetric non-contextual representation with a Gaussian probability distribution of work, for a local quench we can get quantum contextuality as signaled by a negative fourth moment of the work. Furthermore, we examine the critical features related to a quantum phase transition and the role of the initial quantum coherence as useful resource.
Submission history
From: Gianluca Francica [view email][v1] Wed, 22 Feb 2023 10:07:49 GMT (153kb,D)
[v2] Thu, 15 Jun 2023 19:56:59 GMT (156kb,D)
[v3] Mon, 19 Jun 2023 06:13:11 GMT (156kb,D)
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