  When atoms are accelerated in the vacuum, entanglement among atoms will
degrade compared with the initial situation before the acceleration. In this
paper, we propose a novel and interesting view that the lost entanglement can
be recovered completely when the high-dimensional spacetime is exploited, in
the case that the acceleration is not too large, since the entanglement loss
rate caused by the large acceleration is faster than the recovery process. We
also calculate the entanglement change caused by the anti-Unruh effect and
found that the lost entanglement could just be recovered part by the anti-Unruh
effect, and the anti-Unruh effect could only appear for a finite range of
acceleration when interaction time scale is approximately shorter than the
reciprocal of the energy gap in two dimensional spacetime. The limit case of
zero acceleration is also investigated, which gives an analytical
interpretation for the increase or recovery of entanglement.
