Certifying Quantum Signatures in Thermodynamics and Metrology via Contextuality of Quantum Linear Response

Journal article (2020)

Authors

M.G. Lostaglio QCD/Terhal Group - QuTech Advanced Research Centre , QuTech Advanced Research Centre, Barcelona Institute of Science and Technology (BIST)
Research Group
QCD/Terhal Group (QuTech Advanced Research Centre) (TU Delft)
Copyright: © 2020 M.G. Lostaglio
DOI
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https://doi.org/10.1103/PhysRevLett.125.230603
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Published Date

2020

Language

English

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Faculty

QuTech Advanced Research Centre

Department

Quantum Computing Division

Research Group

QCD/Terhal Group

Abstract

I identify a fundamental difference between classical and quantum dynamics in the linear response regime by showing that the latter is, in general, contextual. This allows me to provide an example of a quantum engine whose favorable power output scaling unavoidably requires nonclassical effects in the form of contextuality. Furthermore, I describe contextual advantages for local metrology. Given the ubiquity of linear response theory, I anticipate that these tools will allow one to certify the nonclassicality of a wide array of quantum phenomena.