Efficient entanglement generation between exciton-polaritons using shortcuts to adiabaticity

TL;DR

This paper introduces a shortcut to adiabaticity method for rapidly generating entanglement between exciton-polaritons in microcavities, outperforming previous approaches by leveraging a time-dependent nonlinearity.

Contribution

The paper presents a novel application of shortcuts to adiabaticity for entanglement generation, allowing the nonlinearity to surpass the Josephson coupling, which was not possible with traditional methods.

Findings

Significant improvement in entanglement efficiency.

Utilization of a time-dependent nonlinearity exceeding the Josephson coupling.

Potential applications in optical systems with nonlinear bosons.

Abstract

We use shortcuts to adiabaticity, a method introduced to speed up adiabatic quantum dynamics, for the efficient generation of entanglement between exciton-polaritons in coupled semiconductor microcavities. A substantial improvement is achieved, compared to a recently proposed method which essentially enhances the nonlinearity of the system. Our method takes advantage of a time-dependent nonlinearity which can become larger than the Josephson coupling between the cavities, while the conventional method is restricted to a constant nonlinearity lower than the coupling. The suggested procedure is expected to find also application in other research areas in optics, where nonlinear interacting bosons are encountered.