Measurement of the Temperature Using the Tomographic Representation of Thermal States for Quadratic Hamiltonians

Autor:	Julio A. López-Saldívar, Margarita A. Man’ko, Vladimir I. Man’ko
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	Wigner function tomogram Gaussian states temperature thermal states coupled harmonic oscillators Science Astrophysics QB460-466 Physics QC1-999
Zdroj:	Entropy, Vol 23, Iss 11, p 1445 (2021)
Druh dokumentu:	article
ISSN:	23111445 1099-4300
DOI:	10.3390/e23111445
Popis:	The Wigner and tomographic representations of thermal Gibbs states for one- and two-mode quantum systems described by a quadratic Hamiltonian are obtained. This is done by using the covariance matrix of the mentioned states. The area of the Wigner function and the width of the tomogram of quantum systems are proposed to define a temperature scale for this type of states. This proposal is then confirmed for the general one-dimensional case and for a system of two coupled harmonic oscillators. The use of these properties as measures for the temperature of quantum systems is mentioned.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/d8c88d3ab53b41fbb5d29ea7b39b0d8c Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF Plný text ve formátu HTML
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