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Title: Quantum work and the thermodynamic cost of quantum measurements

Journal Article · · Physical Review E
 [1];  [2];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Ciudad Univ. Pabellon, Buenos Aires (Argentina)

Quantum work is usually determined from two projective measurements of the energy at the beginning and at the end of a thermodynamic process. However, this paradigm cannot be considered thermodynamically consistent as it does not account for the thermodynamic cost of these measurements. To remedy this conceptual inconsistency we introduce a paradigm that relies only on the expected change of the average energy given the initial energy eigenbasis. In particular, we completely omit quantum measurements in the definition of quantum work, and hence quantum work is identified as a thermodynamic quantity of only the system. As main results we derive a modified quantum Jarzynski equality and a sharpened maximum work theorem in terms of the information free energy. Lastly, a comparison of our results with the standard approach allows one to quantify the informational cost of projective measurements.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1338795
Alternate ID(s):
OSTI ID: 1260862
Report Number(s):
LA-UR-16-21506; PLEEE8; TRN: US1701795
Journal Information:
Physical Review E, Vol. 94, Issue 1; ISSN 2470-0045
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 61 works
Citation information provided by
Web of Science

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Cited By (26)

Dynamics of a qubit while simultaneously monitoring its relaxation and dephasing journal May 2018
Quantum fluctuation theorem for error diagnostics in quantum annealers journal November 2018
Time-reversal symmetric work distributions for closed quantum dynamics in the histories framework journal June 2017
Verification of the quantum nonequilibrium work relation in the presence of decoherence journal January 2018
Work estimation and work fluctuations in the presence of non-ideal measurements journal November 2019
Quantum speed limits: from Heisenberg’s uncertainty principle to optimal quantum control journal October 2017
Reconstructing quantum entropy production to probe irreversibility and correlations journal June 2018
Work distribution in a photonic system journal October 2016
Macroscopic realism of quantum work fluctuations journal July 2017
Measurement-dependent corrections to work distributions arising from quantum coherences journal November 2017
Heisenberg-Langevin versus quantum master equation journal December 2017
Quantum work in the Bohmian framework journal January 2018
Operational approach to quantum stochastic thermodynamics journal August 2019
Symmetry and its breaking in a path-integral approach to quantum Brownian motion journal December 2019
Jarzynski Equality for Driven Quantum Field Theories journal February 2018
Experimentally reducing the quantum measurement back action in work distributions by a collective measurement journal March 2019
Work distribution in a photonic system text January 2016
Trade-off between speed and cost in shortcuts to adiabaticity text January 2016
Time-reversal symmetric work distributions for closed quantum dynamics in the histories framework text January 2016
Macroscopic realism of quantum work fluctuations text January 2017
Quantum speed limits: from Heisenberg's uncertainty principle to optimal quantum control text January 2017
Measurement-dependent corrections to work distributions arising from quantum coherences text January 2017
Reconstructing quantum entropy production to probe irreversibility and correlations text January 2017
Heisenberg-Langevin vs. quantum master equation text January 2017
Verification of the Quantum Nonequilibrium Work Relation in the Presence of Decoherence text January 2017
Jarzynski Equality for Driven Quantum Field Theories text January 2017

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