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arXiv 1208.0657physics.optics
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光镊跟踪粒子的基本约束条件

Fundamental constraints on particle tracking with optical tweezers

Michael A. Taylor, Joachim Knittel, Warwick P. Bowen

摘要:

粒子位置测量的灵敏度的一般量子极限是根据海森堡显微镜的简单原理导出的。这个限制的值计算颗粒在瑞利和米氏散射制度,并与相关的光镊实验的参数。还计算了观察悬浮珠的零点运动所需的最小功率,最佳颗粒直径总是小于波长。我们表明,最近的光镊实验是在两个数量级的量子有限的灵敏度,这表明量子光资源可能很快在高灵敏度跟踪应用中发挥重要作用。

英文摘要:

A general quantum limit to the sensitivity of particle position measurements is derived following the simple principle of the Heisenberg microscope. The value of this limit is calculated for particles in the Rayleigh and Mie scattering regimes, and with parameters which are relevant to optical tweezers experiments. The minimum power required to observe the zero-point motion of a levitating bead is also calculated, with the optimal particle diameter always smaller than the wavelength. We show that recent optical tweezers experiments are within two orders of magnitude of quantum limited sensitivity, suggesting that quantum optical resources may soon play an important role in high sensitivity tracking applications.

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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