Energy balance for a dissipative quantum system

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Energy balance for a dissipative quantum system

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Energy balance for a dissipative quantum system

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BE - Teoretická fyzika

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Physica Scripta

ISSN

0031-8949

e-ISSN

—

Svazek periodika

89

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

SE - Švédské království

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

000343578000024

EID výsledku v databázi Scopus

—