Title: Long-range entanglement and multiple steady states in a lossy qubit array

Speaker: Dr. Shovan Dutta, Cambridge, UK

Abstract: Environmental coupling typically drives a quantum system to a unique steady state with little coherence, which is a major obstacle for quantum information processing. I will talk about a simple experimental setting of an array of two-level systems with localised pump and loss that has multiple highly coherent steady states, including maximally entangled states of nonlocal Bell pairs. Such states originate from a hidden symmetry that conserves Bell pairs over long distances, leading to controllable long-range entanglement. I will discuss how to selectively prepare and observe these states in a broad range of present-day setups.

Ref: https://arxiv.org/abs/2004.07981 (to appear in PRL).