  In this paper, we use the concepts of quantum entanglement and coherence to
analyze the Unruh and anti-Unruh effects based on the model of Unruh-DeWitt
detector. For the first time, we find that (i) the Unruh effect reduces quantum
entanglement but enhances quantum coherence; (ii) the anti-Unruh effect
enhances quantum entanglement but reduces quantum coherence. This surprising
result refutes the notion that the Unruh effect can only destroy quantum
entanglement and coherence simultaneously, and that the anti-Unruh can only
protect quantum resources. Consequently, it opens up a new source for
discovering experimental evidence supporting the existence of the Unruh and
anti-Unruh effects.
