Dynamical emission of phonon pairs in optomechanical systems

TL;DR

This paper proposes a scheme using stimulated Raman adiabatic passage in a cavity optomechanical system to dynamically emit tunable phonon pairs, demonstrating antibunched phonon-pair emission with potential for quantum communication.

Contribution

It introduces a novel method to generate tunable, antibunched phonon pairs in a single cavity optomechanical system using pulse-driven stimulated Raman adiabatic passage.

Findings

Dynamical phonon-pair emission is achievable under specific parameters.

The system can act as an antibunched phonon-pair emitter.

Potential extension to n-phonon antibunched emission for quantum communication.

Abstract

Multiphonon state plays an important role in quantum information processing and quantum metrology. Here we propose a scheme to realize dynamical emission of phonon pairs based on the technique of stimulated Raman adiabatic passage in a single cavity optomechanical system, where the optical cavity is driven by two Gaussian pulse lasers. By exploring quantum trajectories of the state populations and the average phonon number, we find that the dynamical phonon-pair emission can be realized under the appropriate parameter conditions and is tunable by controlling the time interval between the consecutive pulses of pump lasers. In particular, the numerical results for the standard and generalized second-order correlation functions of the mechanical mode show that the system can behave as an antibunched phonon-pair emitter. Our proposal can be extended to achieve an antibunched $n$-phonon emitter, which has potential applications for on-chip quantum communications.