Clock-Work Trade-Off Relation for Coherence in Quantum Thermodynamics

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Title: Clock-Work Trade-Off Relation for Coherence in Quantum Thermodynamics
Author(s): Kwon, H
Jeong, H
Jennings, D
Yadin, B
Kim, MS
Item Type: Journal Article
Abstract: In thermodynamics, quantum coherences—superpositions between energy eigenstates—behave in distinctly nonclassical ways. Here we describe how thermodynamic coherence splits into two kinds—“internal” coherence that admits an energetic value in terms of thermodynamic work, and “external” coherence that does not have energetic value, but instead corresponds to the functioning of the system as a quantum clock. For the latter form of coherence, we provide dynamical constraints that relate to quantum metrology and macroscopicity, while for the former, we show that quantum states exist that have finite internal coherence yet with zero deterministic work value. Finally, under minimal thermodynamic assumptions, we establish a clock–work trade-off relation between these two types of coherences. This can be viewed as a form of time-energy conjugate relation within quantum thermodynamics that bounds the total maximum of clock and work resources for a given system.
Publication Date: 12-Apr-2018
Date of Acceptance: 2-Mar-2018
URI: http://hdl.handle.net/10044/1/59189
DOI: https://dx.doi.org/10.1103/PhysRevLett.120.150602
ISSN: 0031-9007
Publisher: American Physical Society
Journal / Book Title: PHYSICAL REVIEW LETTERS
Volume: 120
Issue: 15
Copyright Statement: © 2018 American Physical Society
Sponsor/Funder: Engineering & Physical Science Research Council (E
The Royal Society
Funder's Grant Number: EP/K034480/1
WM140063
Keywords: Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
FISHER INFORMATION
DISCORD
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
FISHER INFORMATION
DISCORD
02 Physical Sciences
General Physics
Publication Status: Published
Article Number: ARTN 150602
Online Publication Date: 2018-04-12
Appears in Collections:Quantum Optics and Laser Science
Physics
Faculty of Natural Sciences



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