Correlation approach to work extraction from finite quantum systems

Gian Luca Giorgi, Steve Campbell

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Reversible work extraction from identical quantum systems via collective operations was shown to be possible even without producing entanglement among the sub-parts. Here, we show that implementing such global operations necessarily imply the creation of quantum correlations, as measured by quantum discord. We also reanalyze the conditions under which global transformations outperform local gates as far as maximal work extraction is considered by deriving a necessary and sufficient condition that is based on classical correlations.
Original languageEnglish
Article number035501
Number of pages8
JournalJournal of Physics B: Atomic Molecular and Optical Physics
Volume48
Issue number3
Early online date13 Jan 2015
DOIs
Publication statusPublished - 14 Feb 2015

Cite this

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Correlation approach to work extraction from finite quantum systems. / Giorgi, Gian Luca; Campbell, Steve.

In: Journal of Physics B: Atomic Molecular and Optical Physics, Vol. 48, No. 3, 035501, 14.02.2015.

Research output: Contribution to journalArticle

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AB - Reversible work extraction from identical quantum systems via collective operations was shown to be possible even without producing entanglement among the sub-parts. Here, we show that implementing such global operations necessarily imply the creation of quantum correlations, as measured by quantum discord. We also reanalyze the conditions under which global transformations outperform local gates as far as maximal work extraction is considered by deriving a necessary and sufficient condition that is based on classical correlations.

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