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arXiv 2006.14686quant-ph
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利用光力学实验获得压缩力学振子的量子运动

Quantum motion of a squeezed mechanical oscillator attained via a optomechanical experiment

P. Vezio, A. Chowdhury, M. Bonaldi, A. Borrielli, F. Marino, B. Morana, G. A. Prodi, P. M. Sarro, E. Serra, F. Marin

摘要:

实验研究了在嵌入光学腔中的参量调制薄膜谐振器中实现的机械压缩态。我们证明,即使在一个适度温暖的振子,通过分析的运动边带的压缩动力学的量子特性可以揭示和量化。我们提供了一个理论框架,定量解释的意见,并提出了一个扩展的比较与实验。一个值得注意的结果是,每个运动边带的光谱形状提供了一个明确的签名的量子力学压缩状态,而没有必要的绝对校准,特别是在该制度中,在压缩正交的剩余波动降低到零点水平以下。

英文摘要:

We experimentally investigate a mechanical squeezed state realized in a parametrically-modulated membrane resonator embedded in an optical cavity. We demonstrate that a quantum characteristic of the squeezed dynamics can be revealed and quantified even in a moderately warm oscillator, through the analysis of motional sidebands. We provide a theoretical framework for quantitatively interpreting the observations and present an extended comparison with the experiment. A notable result is that the spectral shape of each motional sideband provides a clear signature of a quantum mechanical squeezed state without the necessity of absolute calibrations, in particular in the regime where residual fluctuations in the squeezed quadrature are reduced below the zero-point level.

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