Cooling and thermophonon transports in nonlinear optomechanical systems

We propose theoretically a nonlinear optomechanical system with a suspended graphene sheet, a single atom and a degenerate optical parametric amplifier to explore the ground-state cooling of the graphene oscillator and the steady-state thermophonon flux flowing from the thermal bath of the graphene...

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Autores principales:	Yu Wu, Qinghong Liao, Aixi Chen, Wenjie Nie
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Optomechanical system Optical parametric amplifiers Thermophonon transports Ground-state cooling Physics QC1-999
Acceso en línea:	https://doaj.org/article/b9c6c7bfed9a449e8de407c0954d43c6
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id	oai:doaj.org-article:b9c6c7bfed9a449e8de407c0954d43c6
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spelling	oai:doaj.org-article:b9c6c7bfed9a449e8de407c0954d43c62021-12-02T05:01:16ZCooling and thermophonon transports in nonlinear optomechanical systems2211-379710.1016/j.rinp.2021.104996https://doaj.org/article/b9c6c7bfed9a449e8de407c0954d43c62021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2211379721010007https://doaj.org/toc/2211-3797We propose theoretically a nonlinear optomechanical system with a suspended graphene sheet, a single atom and a degenerate optical parametric amplifier to explore the ground-state cooling of the graphene oscillator and the steady-state thermophonon flux flowing from the thermal bath of the graphene oscillator into the optomechanical system. We find that the cooling properties of the graphene oscillator and the magnitude of thermophonon flux can be controlled flexibly by changing the vacuum coupling strength between the trapped atom and the nearby graphene sheet. In particular, the maximum thermophonon flux always corresponds to the minimum effective phonon number of the graphene sheet, which attributes to the optimal transfer of thermal noise energy at the optimal cavity field detuning. We also investigate in detail the influence of the parametric gain, the pump phase, the oscillating frequency, the position of the atom and the temperature on the cooling and the thermophonon flux. The results obtained here have potential applications in evaluating thermal noise energy transport and preparation of functional thermal devices.Yu WuQinghong LiaoAixi ChenWenjie NieElsevierarticleOptomechanical systemOptical parametric amplifiersThermophonon transportsGround-state coolingPhysicsQC1-999ENResults in Physics, Vol 31, Iss , Pp 104996- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Optomechanical system Optical parametric amplifiers Thermophonon transports Ground-state cooling Physics QC1-999
spellingShingle	Optomechanical system Optical parametric amplifiers Thermophonon transports Ground-state cooling Physics QC1-999 Yu Wu Qinghong Liao Aixi Chen Wenjie Nie Cooling and thermophonon transports in nonlinear optomechanical systems
description	We propose theoretically a nonlinear optomechanical system with a suspended graphene sheet, a single atom and a degenerate optical parametric amplifier to explore the ground-state cooling of the graphene oscillator and the steady-state thermophonon flux flowing from the thermal bath of the graphene oscillator into the optomechanical system. We find that the cooling properties of the graphene oscillator and the magnitude of thermophonon flux can be controlled flexibly by changing the vacuum coupling strength between the trapped atom and the nearby graphene sheet. In particular, the maximum thermophonon flux always corresponds to the minimum effective phonon number of the graphene sheet, which attributes to the optimal transfer of thermal noise energy at the optimal cavity field detuning. We also investigate in detail the influence of the parametric gain, the pump phase, the oscillating frequency, the position of the atom and the temperature on the cooling and the thermophonon flux. The results obtained here have potential applications in evaluating thermal noise energy transport and preparation of functional thermal devices.
format	article
author	Yu Wu Qinghong Liao Aixi Chen Wenjie Nie
author_facet	Yu Wu Qinghong Liao Aixi Chen Wenjie Nie
author_sort	Yu Wu
title	Cooling and thermophonon transports in nonlinear optomechanical systems
title_short	Cooling and thermophonon transports in nonlinear optomechanical systems
title_full	Cooling and thermophonon transports in nonlinear optomechanical systems
title_fullStr	Cooling and thermophonon transports in nonlinear optomechanical systems
title_full_unstemmed	Cooling and thermophonon transports in nonlinear optomechanical systems
title_sort	cooling and thermophonon transports in nonlinear optomechanical systems
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/b9c6c7bfed9a449e8de407c0954d43c6
work_keys_str_mv	AT yuwu coolingandthermophonontransportsinnonlinearoptomechanicalsystems AT qinghongliao coolingandthermophonontransportsinnonlinearoptomechanicalsystems AT aixichen coolingandthermophonontransportsinnonlinearoptomechanicalsystems AT wenjienie coolingandthermophonontransportsinnonlinearoptomechanicalsystems
_version_	1718400849840963584

Cooling and thermophonon transports in nonlinear optomechanical systems

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