Autonomous quantum rotator

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Standard

Autonomous quantum rotator. / Fogedby, Hans C.; Imparato, Alberto.

I: EPL, Bind 122, Nr. 1, 10006, 04.2018.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

APA

CBE

MLA

Vancouver

Author

Bibtex

@article{ee83258d3b064556b30453fc28ab673d,
title = "Autonomous quantum rotator",
abstract = "We consider a minimal model of a quantum rotator composed of a single particle confined in a harmonic potential and driven by two temperature-biased heat reservoirs. In the case the particle potential is rendered asymmetric and rotated an angle, a finite angular momentum develops, corresponding to a directed rotary motion. At variance with the classical case, the thermal fluctuations in the baths give rise to a non-vanishing average torque contribution; this is a genuine quantum effect akin to the Casimir effect. In the steady state the heat current flowing between the two baths is systematically converted into particle rotation. We derive exact expressions for the work rate and heat currents in the case in which the system is driven by an external time-periodic mechanical force. We show, in agreement with previous works on classical systems, that for this choice of external manipulation protocol, the rotator cannot work either as a heat pump or as a heat engine. We finally use our exact results to extend an ab initio quantum simulation algorithm to the out-of-equilibrium regime. Copyright (C) EPLA, 2018",
keywords = "LANGEVIN EQUATION",
author = "Fogedby, {Hans C.} and Alberto Imparato",
year = "2018",
month = apr,
doi = "10.1209/0295-5075/122/10006",
language = "English",
volume = "122",
journal = "EPL",
issn = "0295-5075",
publisher = "IOP Publishing",
number = "1",

}

RIS

TY - JOUR

T1 - Autonomous quantum rotator

AU - Fogedby, Hans C.

AU - Imparato, Alberto

PY - 2018/4

Y1 - 2018/4

N2 - We consider a minimal model of a quantum rotator composed of a single particle confined in a harmonic potential and driven by two temperature-biased heat reservoirs. In the case the particle potential is rendered asymmetric and rotated an angle, a finite angular momentum develops, corresponding to a directed rotary motion. At variance with the classical case, the thermal fluctuations in the baths give rise to a non-vanishing average torque contribution; this is a genuine quantum effect akin to the Casimir effect. In the steady state the heat current flowing between the two baths is systematically converted into particle rotation. We derive exact expressions for the work rate and heat currents in the case in which the system is driven by an external time-periodic mechanical force. We show, in agreement with previous works on classical systems, that for this choice of external manipulation protocol, the rotator cannot work either as a heat pump or as a heat engine. We finally use our exact results to extend an ab initio quantum simulation algorithm to the out-of-equilibrium regime. Copyright (C) EPLA, 2018

AB - We consider a minimal model of a quantum rotator composed of a single particle confined in a harmonic potential and driven by two temperature-biased heat reservoirs. In the case the particle potential is rendered asymmetric and rotated an angle, a finite angular momentum develops, corresponding to a directed rotary motion. At variance with the classical case, the thermal fluctuations in the baths give rise to a non-vanishing average torque contribution; this is a genuine quantum effect akin to the Casimir effect. In the steady state the heat current flowing between the two baths is systematically converted into particle rotation. We derive exact expressions for the work rate and heat currents in the case in which the system is driven by an external time-periodic mechanical force. We show, in agreement with previous works on classical systems, that for this choice of external manipulation protocol, the rotator cannot work either as a heat pump or as a heat engine. We finally use our exact results to extend an ab initio quantum simulation algorithm to the out-of-equilibrium regime. Copyright (C) EPLA, 2018

KW - LANGEVIN EQUATION

U2 - 10.1209/0295-5075/122/10006

DO - 10.1209/0295-5075/122/10006

M3 - Journal article

VL - 122

JO - EPL

JF - EPL

SN - 0295-5075

IS - 1

M1 - 10006

ER -