Disentanglement of two harmonic oscillators in relativistic motion

Understand

We study the dynamics of quantum entanglement between two Unruh-DeWitt detectors, one stationary (Alice), and another uniformly accelerating (Rob), with no direct interaction but coupled to a common quantum field in (3+1)D Minkowski space.

• We find that for all cases studied the initial entanglement between the detectors disappears in a finite time ("sudden death").
• After the moment of total disentanglement the correlations between the two detectors remain nonzero until late times.
• The relation between the disentanglement time and Rob's proper acceleration is observer dependent.