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Chin. Phys. B, 2021, Vol. 30(2): 024204    DOI: 10.1088/1674-1056/abc159

Ground-state cooling based on a three-cavity optomechanical system in the unresolved-sideband regime

Jing Wang(王婧)†
College of Physics, Tonghua Normal University, Tonghua 134000, China
Abstract  In the unresolved sideband regime, we propose a scheme for cooling mechanical resonator close to its ground state in a three-cavity optomechanical system, where the auxiliary cavities are indirectly connected with the mechanical resonator through standard optomechanical subsystem. The standard optomechanical subsystem is driven by a strong pump laser field. With the help of the auxiliary cavities, the heating process is suppressed and the cooling process of the mechanical resonator is enhanced. More importantly, the average phonon number is much less than 1 in a larger range. This means that the mechanical resonator can be cooled down to its ground state. All these interesting features will significantly promote the physical realization of quantum effects in multi-cavity optomechanical systems.
Keywords:  ground-state cooling      three-cavity optomechanical system      unresolved sideband regime  
Received:  19 August 2020      Revised:  08 September 2020      Accepted manuscript online:  15 October 2020
PACS:  42.50.Pq (Cavity quantum electrodynamics; micromasers)  
  42.50.Nn (Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)  
  42.50.Ct (Quantum description of interaction of light and matter; related experiments)  
  03.65.Yz (Decoherence; open systems; quantum statistical methods)  
Fund: Project supported by the Research Fund of Tonghua Normal University (Grant No. 202017ND).
Corresponding Authors:  Corresponding author. E-mail:   

Cite this article: 

Jing Wang(王婧) Ground-state cooling based on a three-cavity optomechanical system in the unresolved-sideband regime 2021 Chin. Phys. B 30 024204

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