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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Quantum coherence and criticality in irreversible work

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Author(s):
Varizi, Adalberto D. [1, 2] ; Vieira, Andre P. [1] ; Cormick, Cecilia [3, 4] ; Drumond, Raphael C. [5] ; Landi, Gabriel T. [1]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Inst Fis, BR-05314970 Sao Paulo - Brazil
[2] Univ Fed Minas Gerais, Inst Ciencias Exatas, Dept Fis, BR-30123970 Belo Horizonte, MG - Brazil
[3] Consejo Nacl Invest Cient & Tecn, Inst Fis Enrique Gaviola, Ciudad Univ, X5016LAE, Cordoba - Argentina
[4] Univ Nacl Cordoba, Ciudad Univ, X5016LAE, Cordoba - Argentina
[5] Univ Fed Minas Gerais, Inst Ciencias Exatas, Dept Matemat, BR-30123970 Belo Horizonte, MG - Brazil
Total Affiliations: 5
Document type: Journal article
Source: PHYSICAL REVIEW RESEARCH; v. 2, n. 3 AUG 20 2020.
Web of Science Citations: 0
Abstract

The irreversible work during a driving protocol constitutes one of the most widely studied measures in nonequilibrium thermodynamics, as it constitutes a proxy for entropy production. In quantum systems, it has been shown that the irreversible work has an additional, genuinely quantum mechanical contribution, due to coherence produced by the driving protocol. The goal of this paper is to explore this contribution in systems that undergo a quantum phase transition. Substantial effort has been dedicated in recent years to understanding the role of quantum criticality in work protocols. However, practically nothing is known about how coherence contributes to it. To shed light on this issue, we study the entropy production in infinitesimal quenches of the one-dimensional XY model. We find that coherence plays a significant role in the entropy production and can even account for most of it in certain situations. Moreover, at low temperatures, the coherence presents a finite cusp at the critical point, whereas the entropy production diverges logarithmically. For high temperatures, however, the coherence presents a kink at the critical point indicating the quantum phase transition that occurs only at T = 0. Alternatively, if the quench is performed in the anisotropy parameter, then we find that there are situations where all of the entropy produced is due to quantum coherences. (AU)

FAPESP's process: 17/07248-9 - Dynamics of aperiodic quantum spin chains
Grantee:Andre de Pinho Vieira
Support type: Regular Research Grants
FAPESP's process: 17/50304-7 - Entropy production in non-equilibrium quantum processes: from foundations to quantum technologies
Grantee:Gabriel Teixeira Landi
Support type: Regular Research Grants
FAPESP's process: 17/07973-5 - Thermodynamics and information technologies with continuous variable quantum systems
Grantee:Gabriel Teixeira Landi
Support type: Regular Research Grants
FAPESP's process: 18/12813-0 - Quantum thermodynamics of bosonic systems
Grantee:Gabriel Teixeira Landi
Support type: Regular Research Grants