Entanglement preservation on two coupled cavities

TL;DR

This paper presents a scheme using auxiliary interactions to preserve entanglement in a two-cavity system sharing a single excitation, effectively inhibiting its evolution within a specific subspace.

Contribution

The authors introduce a novel unitary interaction-based method to inhibit state evolution and preserve entanglement in coupled cavity systems.

Findings

The scheme successfully inhibits state evolution in the targeted subspace.

It effectively preserves initial entanglement during system dynamics.

The method is applicable to systems with shared single excitations.

Abstract

The dynamics of two coupled modes sharing one excitation is considered. A scheme to inhibit the evolution of any initial state in subspace $\{|1_{a},0_{b} >, |0_{a},1_{b}>\}$ is presented. The scheme is based on the unitary interactions with an auxiliary subsystem, and it can be used to preserve the initial entanglement of the system.