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arXiv 1503.05233quant-phphysics.optics
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光阱纳米粒子冷却和力传感的量子模型

Quantum Model of Cooling and Force Sensing With an Optically Trapped Nanoparticle

B. Rodenburg, L. P. Neukirch, A. N. Vamivakas, M. Bhattacharya

备注：
8 pages, 5 figures, supplementary included. This version contains additional data and revised discussion
发表信息：
Optica 3, 318-323 (2016)
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摘要：

光学捕获纳米粒子最近出现了令人兴奋的候选人测试的量子力学在宏观尺度和作为多功能平台的超灵敏度计量。最近的实验已经证明了参数反馈冷却，非平衡物理和温度检测，都在经典制度。在这里，我们提供了第一个量子模型被困纳米粒子冷却和力传感。与现有的理论相比，我们的工作表明，纳米机械基态可以在不使用光学谐振器的情况下制备;冷却机制对应于非线性摩擦;并且冷却过程中的能量损失在时间上是非指数的。我们的研究结果与实验数据在经典极限下表现出很好的一致性，并为旨在制备基态的实验提供了一个基本的理论框架。我们的理论还解决了力感测的优化和基本量子极限，从而为使用悬浮纳米粒子进行超弱力的持续搜索提供了理论方向。

英文摘要：

Optically trapped nanoparticles have recently emerged as exciting candidates for tests of quantum mechanics at the macroscale and as versatile platforms for ultrasensitive metrology. Recent experiments have demonstrated parametric feedback cooling, nonequilibrium physics, and temperature detection, all in the classical regime. Here we provide the first quantum model for trapped nanoparticle cooling and force sensing. In contrast to existing theories, our work indicates that the nanomechanical ground state may be prepared without using an optical resonator; that the cooling mechanism corresponds to nonlinear friction; and that the energy loss during cooling is nonexponential in time. Our results show excellent agreement with experimental data in the classical limit, and constitute an underlying theoretical framework for experiments aiming at ground state preparation. Our theory also addresses the optimization of, and the fundamental quantum limit to, force sensing, thus providing theoretical direction to ongoing searches for ultra-weak forces using levitated nanoparticles.

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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