Self-healing of Einstein-Rosen-Podolsky steering after an obstruction.

Abstract

Einstein-Rosen-Podolsky (EPR) steering describes the "spooky action at a distance" that one party can instantaneously affect the states of another distant party if they share quantum correlations. Due to its intriguing properties, EPR steering is recognized as an essential resource for a number of quantum information tasks. However, EPR steering may be destroyed when distributed in practical environments. Here, we experimentally show that EPR steering can self-heal after being destroyed by an obstruction. Such self-healing of EPR steering originates from the self-healing property of Bessel-Gaussian beams which are utilized to distribute EPR steering. For comparison, we show that when distributed using fundamental Gaussian beams, EPR steering cannot self-heal after an obstruction under similar conditions. Our results shed new light on constructing EPR-steering-based quantum information tasks in practical environments and provide a promising platform to study EPR steering.