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arXiv 0705.1728quant-phcond-mat.mes-hallgr-qcphysics.optics
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微机械振荡器的基态冷却:冷阻尼和腔辅助冷却方案的通用框架

Ground-state cooling of a micromechanical oscillator: generalized framework for cold damping and cavity-assisted cooling schemes

Claudiu Genes, David Vitali, Paolo Tombesi, Sylvain Gigan, Markus Aspelmeyer

摘要:

我们提供了一个一般的框架来描述通过与驱动光腔的辐射-压力耦合将微机械振荡器冷却到其量子基态。我们将其应用到两个实验实现的计划,通过失谐腔和冷阻尼量子反馈冷却的反作用冷却,我们确定了这两个计划的最终量子极限的稳定腔的整个参数范围。虽然两者都允许达到振荡器的量子基态,我们发现,反作用冷却是更有效的良好的腔限制,即当腔带宽小于机械频率,而冷阻尼是更适合坏的腔限制。以前的治疗结果恢复为特定参数制度的限制情况下。

英文摘要:

We provide a general framework to describe cooling of a micromechanical oscillator to its quantum ground state by means of radiation-pressure coupling with a driven optical cavity. We apply it to two experimentally realized schemes, back-action cooling via a detuned cavity and cold-damping quantum-feedback cooling, and we determine the ultimate quantum limits of both schemes for the full parameter range of a stable cavity. While both allow to reach the oscillator's quantum ground state, we find that back-action cooling is more efficient in the good cavity limit, i.e. when the cavity bandwidth is smaller than the mechanical frequency, while cold damping is more suitable for the bad cavity limit. The results of previous treatments are recovered as limiting cases of specific parameter regimes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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