Quantum squeezing in a modulated optomechanical system

Abstract

Quantum squeezing, as a typical quantum effect, is an important resource for many applications in quantum technologies. Here we propose a scheme for generating quantum squeezing, including the ponderomotive squeezing and the mechanical squeezing, in an optomechanical system, in which the radiation-pressure coupling and the mechanical spring constant are modulated periodically. In this system, the radiation-pressure interaction can be enhanced remarkably by the modulation-induced mechanical parametric amplification. Moreover, the effective phonon noise can be suppressed completely by introducing a squeezed vacuum reservoir. This ultimately leads to that our scheme can achieve a controllable quantum squeezing. Numerical calculations show that our scheme is experimentally realizable with current technologies.

Photon-assisted entanglement and squeezing generation and decoherence suppression via a quadratic optomechanical coupling

“…Now we analyze the effects of the photon and the dissipation on the squeezing properties of the oscillator. The squeezing of the oscillator can be evaluated by the variances of its quadrature operators, X + = S(r n )(b † + b)S † (r n ) and X − = S(r n )[i(b † − b)]S † (r n ), as follows [32,37],…”

Strong Squeezing of Duffing Oscillator in a Highly Dissipative Optomechanical Cavity System

“…The basic method of generating mechanical squeezing is to introduce a parametric amplification to mechanical oscillator which can be obtained directly by two‐phonon driving, [ 42,43 ] or indirectly by induced methods such as modulating the frequency of the mechanical oscillator [ 44 ] or the amplitude of driving field, [ 45 ] driving the cavity with two‐tone fields, [ 46,47 ] employing the non‐Marokovian bath of mechanical mode, [ 48 ] etc.…”

Cooling in a parametrically driven optomechanical cavity

“…There have been other studies that include the modulation of optomechanical parameters. Some of these in-clude modulating the spring constant and the interaction strength to achieve a splitting of the cavity sidebands [12] reach a non-linear quantum regime [13], or achieve controllable quantum squeezing [14]. Other studies cover the periodic Langevin equations that arise in a bi-chromatically driven optical cavity [15] and modulating the amplitude of the driving field [16] in order to achieve squeezing of the mechanical resonator.…”