基于频率调制和双冷却通道的机械振子的基态冷却

基于光-电力学系统提出了一个机械振子的基态冷却方案.在该系统中,机械振子的一端通过辐射压力与光学腔耦合,另一端通过电容与超导微波腔耦合,通过对光腔、微波腔和机械振子进行周期性的频率调制将机械振子冷却到基态.采用协方差矩阵的方法对冷却动力学进行了数值模拟与分析,结果表明采用双冷却通道和频率调制所得的冷却速率远高于标准单腔光力系统,并且该系统可有效抑制斯托克斯加热过程,因此本文方案可有效提高机械振子的冷却效率.

Ground-state cooling of a mechanical oscillator based on frequency modulation and dual-cooling channel

A scheme of ground -state cooling for a mechanical oscillatoris proposed based on an opto -electro -mechanical system, in which the oscillator is coupled to an optical cavity through radiation pressure and simultaneously coupled to a superconducting microwave through efficient capacitance. Meanwhile the periodical frequency modulations are applied to the optical, microwave, and mechanical modes, respectively. By using the covariance matrix method, the cooling dynamics is simulated and analyzed numerically. The results show that the cooling rate obtained by using the double channel and frequency modulations is faster than the standard optomechanical system with a single cavity. Meanwhile, the Stokes heating processes can be suppressed effectively and the cooling efficiency can be improved with this system.