Steady-state mechanical squeezing and ground-state cooling of a Duffing anharmonic oscillator in an optomechanical cavity assisted by a nonlinear medium

Momeni, F.; Naderi, M. H.

doi:10.1088/1555-6611/aaac70

Cited by 6 publications

(2 citation statements)

References 79 publications

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“…More and more researchers are interested in using radiation pressure to manipulate the center-of-mass motion of mechanical oscillators [2,3]. In recent years, the optical-mechanical systems have drawn much more research interest in the cooling of the mechanical oscillator [4,5], the entanglement between the optical mode and the mechanical oscillator [6], optomechanically induced transparency [7] and so on. The cooling of the mechanical oscillator to quantum ground-state has become a key goal of optomechanics.…”

Section: Introductionmentioning

confidence: 99%

Collapse of superradiant phase and Dicke phase transition at finite temperature in a hybrid optical-mechanical system

Huang¹,

Liu²,

Liang³

et al. 2021

Phys. Scr.

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In this paper, we theoretically investigate Dicke phase transition at finite temperature in a hybrid optical-mechanical system. The thermodynamic equilibrium states are presented by means of the functional path-integral approach. We plot the mean photon number of the two cavities and the corresponding phase diagram showing the effects of the coupling strength between the two cavities, the nonlinear photon-phonon interaction strength, the finite temperature, the detuning of the two cavities. The coupling strength between the two cavities can make the phase boundary of the normal phase (NP) to the superradiant phase (SP) shift left with the increase of the atom-field coupling strength. The region of the SP is suppressed completely and the SP disappears completely with the increase of the coupling strength between the two cavities or the nonlinear photon-phonon interaction strength, finally just the NP and the dynamically unstable state (DUS) exist. The nonlinear photon-phonon coupling strength just affects the turning curve, but not the phase boundary. The unstable non-zero photon number state and the SP are coexistent, similar to the optical bistability.

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Section: Introductionmentioning

confidence: 99%

Collapse of superradiant phase and Dicke phase transition at finite temperature in a hybrid optical-mechanical system

Huang¹,

Liu²,

Liang³

et al. 2021

Phys. Scr.

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“…Introduction.-Non-linearities have been proposed to be used in optomechanical systems for inducing steadystate mechanical squeezing 1 , ground state cooling 2 , achieving sub-Poissonian statistics 3 and generating non-Gaussian states 4 .…”

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confidence: 99%

Characterization of non-linearities through mechanical squeezing in levitated optomechanics

Setter

Vovrosh

2019

Applied Physics Letters

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We demonstrate a technique to estimate the strength of non-linearities present in the trapping potential of an optically levitated nanoparticle. By applying a brief pulsed reduction in trapping laser power of the system such as to squeeze the phase space distribution and then matching the time evolution of the shape of the phase space distribution to that of numerical simulations, one can estimate the strength of the non-linearity present in the system. We apply this technique to estimate the strength of the Duffing non-linearity present in the optical trapping potential.

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Weak Force Sensing Based on Optical Parametric Amplification in a Cavity Optomechanical System Coupled in Series with Two Oscillators

Liu,

Yang

et al. 2024

Annalen der Physik

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In the realm weak force sensing, an important issue is to suppress fundamental noise (quantum noise and thermal noise), as they limit the accuracy of force measurement. In this study, a weak force sensing scheme that combines a degenerate optical parametric amplifier (OPA) and an auxiliary mechanical oscillator into a cavity optomechanical system to reduce quantum noise is investigated. It is demonstrated that the noise reduction of two coupled oscillators depends on their norm mode splitting. and provide a classic analogy and quantum perspective for further clarification. Besides, the noise reduction mechanism of OPA is to reduce the fluctuation of photon number and enhance the squeezing of the cavity field. A specific design is proposed that aimed at enhancing the joint effect of both, beyond what can be achieved using OPA alone or two series coupled oscillators. This scheme provides a new perspective for deeper understanding of cavity field squeezing and auxiliary oscillator in force sensing.

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Steady-state mechanical squeezing and ground-state cooling of a Duffing anharmonic oscillator in an optomechanical cavity assisted by a nonlinear medium

Cited by 6 publications

References 79 publications

Collapse of superradiant phase and Dicke phase transition at finite temperature in a hybrid optical-mechanical system

Collapse of superradiant phase and Dicke phase transition at finite temperature in a hybrid optical-mechanical system

Characterization of non-linearities through mechanical squeezing in levitated optomechanics

Weak Force Sensing Based on Optical Parametric Amplification in a Cavity Optomechanical System Coupled in Series with Two Oscillators

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