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arXiv · 2409.10694

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.

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Alolika Roy, Amarendra K. Sarma. 2024-09-16. Overcoming the Standard Quantum Limit with Electro-Optomechanical Hybrid System for Enhanced Force Sensing. https://arxiv.org/abs/2409.10694

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