发表机构
ETH Zürich（苏黎世联邦理工学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出利用光学倒置势阱对室温真空光悬浮二氧化硅纳米颗粒的摆动模式进行指数加速压缩，在250纳秒内实现低于真空涨落11 dB的量子压缩，为机械运动量子压缩和量子增强传感提供新范式。
AI 中文摘要
纳米和微米机械运动的非经典态使得测量能够超越标准量子极限，并构成量子传感和计量学的重要资源。迄今为止，最强烈压缩的机械态是在低温制冷条件下利用机电平台和储层工程产生的。要将机械系统更深入地推进到量子压缩区域，需要能够提高压缩产生速率的协议，以更强烈地克服导致态纯度损失的解相干速率。在这里，我们在室温下真空环境中对光悬浮的二氧化硅纳米颗粒的800 kHz摆动模式进行压缩。我们将机械振子暴露于光学产生的倒置势阱中，其中压缩操作以指数加速的速率进行。我们在250纳秒内达到了低于真空涨落11 dB的压缩正交方差。我们的协议为产生机械运动的量子压缩建立了新的范式，并为使用大质量振子进行量子增强传感提供了平台。
英文摘要
Nonclassical states of nano- and micro-mechanical motion enable measurements beyond the standard quantum limit and constitute a key resource for quantum sensing and metrology. The most strongly squeezed mechanical states to date have been generated with electromechanical platforms under cryogenic refrigeration and using reservoir engineering. To push mechanical systems deeper into the quantum-squeezed regime requires protocols that increase the rate at which squeezing is generated to more strongly overcome the decoherence rate at which state purity is lost. Here, we squeeze the 800 kHz libration mode of a silica nanoparticle optically levitated in vacuum at room temperature. We expose our mechanical oscillator to an optically generated inverted potential, where the squeezing operation proceeds at an exponentially accelerated rate. We reach a squeezed quadrature variance 11 dB below the vacuum fluctuations within 250 ns. Our protocol establishes a new paradigm for generating quantum squeezing of mechanical motion and offers a platform for quantum-enhanced sensing with massive oscillators.
