Long-time entanglement in open atomic systems driven by a dissipative squeezed cavity
Phys. Rev. A 114, 023701 – Published 3 August, 2026
DOI: https://doi.org/10.1103/7qlt-clt9
Abstract
Squeezing has attracted increasing attention as a valuable resource for controlling open quantum systems. In this work, we investigate the dynamics of two-level atoms coupled to a dissipative squeezed cavity field. Going beyond the extensively studied scenario of squeezed waveguides, we focus on a purely local atom-cavity coupling, for which photon-mediated coherent interatomic interactions are absent. Remarkably, we find that atomic entanglement can still be generated and maintained in this setting. On the theoretical side, we analytically reveal a multiple degeneracy of the Liouvillian superoperator at zero eigenvalue, for both zero and finite temperatures, which leads to a steady state that depends sensitively on the initial condition. Our results enrich the understanding of squeezed open-system dynamics and may stimulate further studies toward quantum information processing based on engineered squeezed environments.
