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Assisted Work Distillation.

Benjamin Morris1, Ludovico Lami1, Gerardo Adesso1

  • 1School of Mathematical Sciences and Centre for the Mathematics and Theoretical Physics of Quantum Non-Equilibrium Systems, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom.

Physical Review Letters
|April 24, 2019
PubMed
Summary
This summary is machine-generated.

This study explores assisted work distillation, where two parties extract work from a quantum state. The optimal work extraction is linked to quantum correlations and entanglement, revealing new insights into quantum thermodynamics.

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Area of Science:

  • Quantum Information Science
  • Quantum Thermodynamics
  • Statistical Mechanics

Background:

  • Assisted work distillation involves two parties sharing a quantum state.
  • One party is limited to thermal operations, while the other has general quantum operations and classical communication.

Purpose of the Study:

  • To determine the optimal amount of work that can be locally distilled from a bipartite quantum state under restricted operations.
  • To investigate the relationship between work distillation and the distillation of classical and quantum correlations.

Main Methods:

  • Analysis of bipartite quantum states under local operations and classical communication.
  • Connection to concepts of entanglement of formation and quantum correlations.

Main Results:

  • The advantage of global measurements over multiple copies of the state is related to the nonadditivity of entanglement of formation.
  • Work can be bound within quantum correlations, extractable only through local Gibbs-preserving operations.

Conclusions:

  • Assisted work distillation is fundamentally linked to quantum and classical correlations.
  • Entanglement properties, specifically nonadditivity, play a crucial role in maximizing work extraction.
  • Quantum correlations can store extractable work beyond standard thermal operations.