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Inadequacy of von Neumann entropy for characterizing extractable work

Abstract:

The lack of knowledge that an observer has about a system limits the amount of work it can extract. This lack of knowledge is normally quantified using the Gibbs/von Neumann entropy. We show that this standard approach is, surprisingly, only correct in very specific circumstances. In general, one should use the recently developed smooth entropy approach. For many common physical situations, including large but internally correlated systems, the resulting values for the extractable work can de...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Publisher's version

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Publisher copy:
10.1088/1367-2630/13/5/053015

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Institution:
University of Oxford
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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, REF-Physics
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Funding agency for:
Vedral, V
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Funding agency for:
Vedral, V
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Publisher:
IOP Publishing Publisher's website
Journal:
New Journal of Physics Journal website
Volume:
13
Issue:
5
Pages:
Article: 053015
Publication date:
2011-05-12
DOI:
EISSN:
1367-2630
ISSN:
1367-2630
URN:
uuid:2fc9a884-8a6d-456c-b7d6-fab23521452a
Source identifiers:
162083
Local pid:
pubs:162083
Language:
English

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