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- Title
Nonequilibrium thermodynamics of quantum coherence beyond linear response.
- Authors
Rodrigues, Franklin L. S.; Lutz, Eric
- Abstract
Quantum thermodynamics allows for the interconversion of quantum coherence and mechanical work. Quantum coherence is thus a potential physical resource for quantum machines. However, formulating a general nonequilibrium thermodynamics of quantum coherence has turned out to be challenging. In particular, precise conditions under which coherence is beneficial to or, on the contrary, detrimental for work extraction from a system have remained elusive. We here develop a generic dynamic-Bayesian-network approach to the far-from-equilibrium thermodynamics of coherence. We concretely derive generalized fluctuation relations and a maximum-work theorem that fully account for quantum coherence at all times, for both closed and open dynamics. We obtain criteria for successful coherence-to-work conversion, and identify a nonequilibrium regime where maximum work extraction is increased by quantum coherence for fast processes beyond linear response. Formulating a general nonequilibrium thermodynamics of quantum coherence and identifying conditions for it to affect work extraction has remained elusive. The authors develop derive generalized fluctuation relations and a maximum-work theorem that fully account for quantum coherence at all times and analyse a driven qubit as a benchmark system.
- Subjects
QUANTUM coherence; QUANTUM thermodynamics; NONEQUILIBRIUM thermodynamics; QUBITS; THERMODYNAMICS
- Publication
Communications Physics, 2024, Vol 7, Issue 1, p1
- ISSN
2399-3650
- Publication type
Article
- DOI
10.1038/s42005-024-01548-2