Formal relation between Pegg-Barnett and Paul quantum phase frameworks

Linowski, Tomasz; Schlichtholz, Konrad; Rudnicki, Łukasz

doi:10.1103/physreva.107.033707

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“…Similarly, the von Neumann entropy of the maximally amplified state approaches the semi-classical Wehrl entropy [30,38]. More recently, it has been shown that the amplified Pegg-Barnett phase formalism approaches the Paul phase formalism [46].…”

Section: Open Systemmentioning

confidence: 92%

Classicality of the Bogoliubov Transformations and the Dynamical Casimir Effect Through the Reduced State of the Field

Linowski

Rudnicki

2023

Acta Phys. Pol. A

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We use the reduced state of the field formalism (Entropy 21, 705 (2019)) to derive conditions under which a Bogoliubov transformation can be considered semi-classical. We apply this result to the dynamical Casimir effect in a moving medium (Phys. Rev. A 78, 042109 ( 2008)), discussing its classical and quantum features. topics: Bogoliubov transformations, dynamical Casimir effect, quantum-to-classical transitions, mesoscopic degrees of freedom

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Section: Open Systemmentioning

confidence: 92%