Reservoir-engineered entanglement in a hybrid modulated three-mode optomechanical system

Abstract

We propose an effective approach for generating highly pure and strong cavity-mechanical entanglement (or optical-microwave entanglement) in a hybrid modulated three-mode optomechanical system. By applying two-tone driving to the cavity and modulating the coupling strength between two mechanical oscillators (or between a mechanical oscillator and a transmission line resonator), we obtain an effective Hamiltonian where an intermediate mechanical mode acting as an engineered reservoir cools the Bogoliubov modes of two target system modes via beam-splitter-like interactions. In this way, the two target modes are driven to two-mode squeezed states in the stationary limit. In particular, we discuss the effects of cavity-driving detuning on the entanglement and the purity. It is found that the cavity-driving detuning plays a critical role in the goal of acquiring highly pure and strongly entangled steady states.

Modulation‐Based Atom‐Mirror Entanglement and Mechanical Squeezing in an Unresolved‐Sideband Optomechanical System

“…In parallel with the development in cavity optomechanics, one modulation approach of particular interest is the so-called periodic modulation. The novel phenomena generated by applying periodic modulation to the cavity optomechanics have also been reported [46][47][48][49][50][51][52][53][54][55][56].…”

Probe Response of an Optomechanical System with Optomechanical Coupling Modulated Periodically

“…[39][40][41][42] Periodic external action proves to be an effective method for modifying the performance of a COMS. [43][44][45][46][47][48][49][50][51] By modulating the mechanical mode periodically, the optical cavity exhibits an interesting laser cooling effect, [52] whereas modulating the optical cavity mode enhances the cooling of the DOI: 10.1002/andp.202300156 mechanical oscillator. [53] When the cavity-driving field undergoes periodic modulation, it is possible to achieve a strong quantum squeezing of the mechanical oscillator and substantial optomechanical entanglement.…”

Significant enhancement in refrigeration and entanglement in auxiliary-cavity-assisted optomechanical systems

“…In particular, environmental thermal noises can destroy fragile quantum entanglement in practical devices. To generate highly pure quantum entanglement, reservoir engineering techniques [79][80][81][82][83][84][85], quantum interference effect [86][87][88][89][90][91], time modulation of the driving laser [92][93][94][95], photon counting techniques [96], and Sagnac effect [97], have been proposed based on cavity optomechanical systems. Despite such achievements, the enhancement of both optomechanical cooling and entanglement, and the protection of fragile quantum correlations in practical devices still need further studies.…”