Energy balance for a dissipative quantum system

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10289318" target="_blank" >RIV/00216208:11320/14:10289318 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1088/0031-8949/89/9/095701" target="_blank" >http://dx.doi.org/10.1088/0031-8949/89/9/095701</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0031-8949/89/9/095701" target="_blank" >10.1088/0031-8949/89/9/095701</a>

Result language

angličtina

Original language name

Energy balance for a dissipative quantum system

Original language description

The role of random force in maintaining equilibrium in a dissipative quantum system is studied here. We compute the instantaneous power supplied by the fluctuating (random) force, which provides information about the work done by the random force on thequantum subsystem of interest. The quantum Langevin equation formalism is used here to verify that, at equilibrium, the work done by the fluctuating force balances the energy lost by the quantum subsystem to the heat bath. The quantum subsystem we chooseto couple to the heat bath is the charged oscillator in a magnetic field. We perform the calculations using the Drude regularized spectral density of bath oscillators instead of using a strict ohmic spectral density that gives memoryless damping. We also discuss the energy balance for our dissipative quantum system and in this regard it is to be understood that the physical system is the charged magneto-oscillator coupled to the heat bath, not the uncoupled charged magneto-oscillator.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BE - Theoretical physics

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2014

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physica Scripta

ISSN

0031-8949

e-ISSN

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Volume of the periodical

89

Issue of the periodical within the volume

9

Country of publishing house

SE - SWEDEN

Number of pages

9

Pages from-to

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UT code for WoS article

000343578000024

EID of the result in the Scopus database

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