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

摘要

Einstein-Rosen-Podolsky (EPR) steering describes the "spooky action at a distance" that one party can instan-taneously affect the states of another distant party if they share quantum correlations. Due to its intriguing proper -ties, 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 envi-ronments. 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 simi-lar 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.

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