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Klaus Mølmer

Macroscopic realism of quantum work fluctuations

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We study the fluctuations of the work performed on a driven quantum system, defined as the difference between subsequent measurements of energy eigenvalues. These work fluctuations are governed by statistical theorems with similar expressions in classical and quantum physics. We show that we can distinguish quantum and classical work fluctuations, as the latter can be described by a macrorealistic theory and hence obey Leggett-Garg inequalities. We show that these inequalities are violated by quantum processes in a driven two-level system and in a harmonic oscillator subject to a squeezing transformation.

OriginalsprogEngelsk
Artikelnummer012115
TidsskriftPhysical Review A
Vol/bind96
Nummer1
Antal sider6
ISSN2469-9926
DOI
StatusUdgivet - 13 jul. 2017

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