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Title: Initial-state dependence of thermodynamic dissipation for any quantum process
Authors: Riechers, Paul M.
Gu, Mile
Keywords: Science::Physics
Issue Date: 2021
Source: Riechers, P. M. & Gu, M. (2021). Initial-state dependence of thermodynamic dissipation for any quantum process. Physical Review E, 103(4), 042145-.
Project: NRF-NRFF2016-02
Journal: Physical Review E 
Abstract: Exact results about the nonequilibrium thermodynamics of open quantum systems at arbitrary timescales are obtained by considering all possible variations of initial conditions of a system. First we obtain a quantum-information theoretic equality for entropy production, valid for an arbitrary initial joint state of system and environment. For any finite-time process with a fixed initial environment, we then show that the system's loss of distinction—relative to the minimally dissipative state—exactly quantifies its thermodynamic dissipation. The quantum component of this dissipation is the change in coherence relative to the minimally dissipative state. Implications for quantum state preparation and local control are explored. For nonunitary processes—like the preparation of any particular quantum state—we find that mismatched expectations lead to divergent dissipation as the actual initial state becomes orthogonal to the anticipated one.
ISSN: 2470-0045
DOI: 10.1103/PhysRevE.103.042145
Rights: © 2021 American Physical Society (APS). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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