Generating entangled fermions by accelerated measurements on the vacuum

Understand

It is shown that accelerated projective measurements on the vacuum of a free Dirac spinor field results in an entangled state for an inertial observer.

• The physical mechanism at work is the Davies-Unruh effect.
• The produced state is always entangled and its entanglement increases as a function of the acceleration, reaching maximal entanglement in the asymptotic limit of infinite acceleration where Bell states are produced.