Vacuum entanglement enhancement by a weak gravitational field

Abstract

Separate regions in space are generally entangled, even in the vacuum state. It is known that this entanglement can be swapped to separated Unruh-DeWitt detectors, i.e., that the vacuum can serve as a source of entanglement. Here, we demonstrate that, in the presence of curvature, the amount of entanglement that Unruh-DeWitt detectors can extract from the vacuum can be increased.

6 pages, 1 figure

References in corpus (2)

• Entangling Power of an Expanding Universe
• Then again, how often does the Unruh-DeWitt detector click if we switch it carefully?