Adding or subtracting a single quantum of excitation to a thermal state of a bosonic system has the counter-intuitive effect of approximately doubling its mean occupation. We perform the first experimental demonstration of this effect outside optics by implementing single-phonon addition and subtraction to a thermal state of a mechanical oscillator via Brillouin optomechanics in an optical whispering-gallery microresonator. Using a detection scheme that combines single-photon counting and optical heterodyne detection, we observe this doubling of the mechanical thermal fluctuations to a high precision. The capabilities of this joint click-dyne detection scheme adds a significant new dimension for optomechanical quantum science and applications.

中文翻译：

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单蓬加减法成机械热态

将一个激发量子加或减到一个玻色子系统的热态具有反直觉的效果，即其平均占有率大约加倍。我们通过在光学耳语画廊微谐振器中通过布里渊光力学实现单声子加减到机械振荡器的热态，来进行光学外部效应的首次实验演示。使用结合了单光子计数和光学外差检测的检测方案，我们观察到机械热波动的这种加倍达到了高精度。这种联合点击达因检测方案的功能为光机械量子科学和应用增加了重要的新维度。