Harvesting Entanglement from the Black Hole Vacuum

Understand

We implement the entanglement harvesting protocol, in which two Unruh-DeWitt detectors become entangled through local interactions with a quantum field, for the first time in the vicinity of a black hole.

• Our study, focusing on the BTZ black hole, reveals that black holes inhibit entanglement harvesting.
• The entanglement harvested rapidly falls to zero when two detectors with fixed proper separation approach the horizon.
• This effect is a combination of black hole radiation and gravitational red shift, both generic properties of horizons, suggesting it is a general result for black holes.