腔光力学中的校准量子测温
Calibrated quantum thermometry in cavity optomechanics
摘要：
腔光学力学在制备和观测特殊量子态的宏观力学振子方面取得了重大突破。在这些条件下，振荡器特性的可靠指标的发展对于量子技术的应用也很重要。我们比较两个程序来推断振荡器占用数，最大限度地减少系统校准的必要性。前者从零差谱出发，后者基于外差谱中运动边带不对称性的测量。此外，我们描述和讨论的方法来控制腔失谐，这是一个关键参数的精度，后者，本质上优越的程序。
英文摘要：
Cavity optomechanics has achieved the major breakthrough of the preparation and observation of macroscopic mechanical oscillators in peculiarly quantum states. The development of reliable indicators of the oscillator properties in these conditions is important also for applications to quantum technologies. We compare two procedures to infer the oscillator occupation number, minimizing the necessity of system calibrations. The former starts from homodyne spectra, the latter is based on the measurement of the motional sidebands asymmetry in heterodyne spectra. Moreover, we describe and discuss a method to control the cavity detuning, that is a crucial parameter for the accuracy of the latter, intrinsically superior procedure.
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