Laser cooling of a high-temperature oscillator by a three-level system

Article

关键词: ELECTROMAGNETICALLY INDUCED TRANSPARENCY;    QUANTUM GROUND-STATE;    RESONATOR;    IONS;   

DOI  :  10.1103/PhysRevB.94.054305

来源: SCIE

【 摘 要 】

We study the laser cooling of a mechanical oscillator through the coupling with a dissipative three-level system. Under a background temperature beyond the Lamb-Dicke regime, we extend the standard cooling analysis by separately studying the classical motion and the quantum dynamics of the oscillator. In ladder-system cooling, the cooling rate degrades by orders of magnitude at large classical motion. This phenomenon causes a critical transition of the final temperature at a hot background. In stark contrast, electromagnetic-induced-transparency (EIT) cooling with a Lambda system produces significant negative cooling rate at high motional excitation. At steady state, the oscillator could exhibit both cooling and lasing behaviors. We argue that a successful EIT cooling requires either a poor quality oscillator to suppress the lasing effect, or terminating the cooling process at a transient stage.

【 授权许可】

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