Volume 131, Number 2, July 2020
|Number of page(s)||7|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||24 August 2020|
Effects of Kerr medium on force sensing in a dissipative optomechanical system
1 Department of Physics and Applied Mathematics - Pakistan Institute of Engineering and Applied Sciences (PIEAS) Nilore, Islamabad 45650, Pakistan
2 Quantum Optics Lab - Department of Physics, COMSATS University - Islamabad, Pakistan
3 Center for Mathematical Sciences - Pakistan Institute of Engineering and Applied Sciences (PIEAS) Nilore, Islamabad 45650, Pakistan
Received: 7 October 2019
Accepted: 11 July 2020
In this paper, we study the effects of the Kerr medium on the detection of a weak classical force acting on an optomechanical oscillator which is coupled purely dissipatively. We find that force sensing better than the standard quantum limit (SQL) of the mechanical oscillator can be achieved in the presence of Kerr medium. We show that increasing the strength of Kerr nonlinearity not only improves the force sensitivity but also increases the measurement bandwidth. Moreover, our results also show that the influence of thermal noise on force sensing is smaller in the presence of optical Kerr medium, thus making the system more robust against thermal fluctuations.
PACS: 42.50.Ct – Quantum description of interaction of light and matter; related experiments / 42.50.Wk – Mechanical effects of light on material media, microstructures and particles
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