论文标题
挤压增强量子传感与二次光学机械
Squeezing-enhanced quantum sensing with quadratic optomechanics
论文作者
论文摘要
通过量子挤压或纠缠增强的空腔光学机械（COM）传感器已成为以高精度和灵敏度测量超弱力的强大工具。但是，这些传感器通常依赖于线性com耦合，这是当需要进行机械能的测量时的基本限制。最近，在二次COM系统中预测了信噪比的巨大增强。在这里，我们表明，通过使用量子挤压光，可以进一步改善这种系统的性能，超过标准量子限制。我们的方法与高级COM传感器的可用工程技术兼容，并为使用COM传感器在物理和量子计量应用的基本定律中提供了新的机会。
Cavity optomechanical (COM) sensors, enhanced by quantum squeezing or entanglement, have become powerful tools for measuring ultra-weak forces with high precision and sensitivity. However, these sensors usually rely on linear COM couplings, a fundamental limitation when measurements of the mechanical energy are desired. Very recently, a giant enhancement of the signal-to-noise ratio was predicted in a quadratic COM system. Here we show that the performance of such a system can be further improved surpassing the standard quantum limit by using quantum squeezed light. Our approach is compatible with available engineering techniques of advanced COM sensors and provides new opportunities for using COM sensors in tests of fundamental laws of physics and quantum metrology applications.
