Nonreciprocal Remote Entanglement and Steering in a Driven‐Dissipative Photonic Network

Abstract A novel scheme is introduced for achieving nonreciprocal remote quantum entanglement and steering within a driven‐dissipative photonic network. By uniquely coupling optical cavity arrays through a unidirectional bath, this approach innovatively generates robust quantum entanglement and asymmetric Einstein–Podolsky–Rosen (EPR) steering among cavities at varying distances. This setup challenges the conventional characterization of multipartite quantum correlations and offers unprecedented control over quantum entanglement and steering in photonic systems. These key findings demonstrate that, contrary to short‐range entanglement which is enhanced by correlated length but weakened by stronger driving, long‐range entanglement stabilizes independently of coherence length. Additionally, it is uncovered that forward quantum steering is sensitive to correlated length, while reverse steering exhibits uniform spatial evolution, highlighting an inherent asymmetry in steering dynamics. The observed amplification of steering asymmetry with increasing driving amplitude further underscores the uniqueness of this approach. These findings open new avenues for leveraging quantum remote entanglement and steering in driven‐dissipative photonic networks and inspire the development of advanced integrated nonreciprocal quantum devices.