Quantum entanglement in the background of cosmic string spacetime

We examine the entanglement behaviors for two static atoms coupled to a massless scalar field in the cosmic string spacetime. The entanglement measure is calculated for different cases for two atoms initially prepared in the Werner state. It is found that entanglement behaviors depend on vacuum fluctuation, two-atom distance and nontrivial spacetime topology. When deficit angle parameter nu =1, the evolution model reduces to that of Minkowski spacetime. When two-atom distance is sufficiently small, entanglement can be preserved from the impact of vacuum fluctuation to some extent. Large deficit angle parameter can accelerate destruction of entanglement and shorten lifetime of entanglement. Entanglement presents slight oscillating behavior as atom-string distance varies. A large atom-string distance can retard the entanglement decay and extend entanglement lifetime as a whole. Our exploration may be useful to sense the cosmic string spacetime topology structure and property in principle.