Overcoming the Standard Quantum Limit with Electro-Optomechanical Hybrid System for Enhanced Force Sensing

Alolika Roy, Amarendra K. Sarma
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Abstract

We investigate the reduction of measurement-added noise in force sensing by analyzing its power spectral density (PSD) within a hybrid optomechanical system. The setup comprises of an optomechanical cavity equipped with a movable mirror which acts as the mechanical oscillator, a stationary semi-transparent mirror, a superconducting qubit, and an optical parametric amplifier (OPA). By utilizing the concept of coherent quantum noise cancellation (CQNC), we derive the conditions necessary for complete cancellation of back-action force, thereby enhancing force sensitivity. Furthermore, with the gradual increase in the OPA pump gains, we suppress the sensitivity beyond the standard quantum limit (SQL) at a lower value of laser power. The removal of back-action noise, along with the reduction of shot noise, improves force detection capabilities, thereby surpassing the standard quantum limit associated with weak force detection.
利用电子-光机械混合系统克服标准量子极限,增强力传感能力
我们通过分析混合光机械系统中的功率谱密度(PSD),研究如何降低力传感中的测量附加噪声。该装置由一个光机械腔、一个固定的半透明反射镜、一个超导量子比特和一个光参量放大器(OPA)组成。通过利用相干量子噪声消除(CQNC)的概念,我们得出了完全消除反作用力的必要条件,从而提高了力灵敏度。此外,随着 OPA 泵浦增益的逐渐增加,我们在较低的激光功率值下抑制了超过标准量子限(SQL)的灵敏度。背向作用噪声的消除以及射出噪声的降低提高了力探测能力,从而超越了与弱强迫探测相关的标准量子极限。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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