Entanglement between accelerated probes in a de Sitter spacetime

We initiate an investigation into features of vacuum entanglement as probed by accelerated quantum probes in curved spacetime. Focusing specifically on de Sitter (dS) spacetime with curvature $\mathrm{\ensuremath{\Lambda}}$, we obtain several exact results corresponding to different kinematical setups of the probes. The interaction with the quantum field creates a nonlocal correlation between initially uncorrelated probes accelerating in different directions. It is well known that a single quantum probe in dS spacetime with uniform acceleration $a$ responds exactly as a quantum probe in Minkowski spacetime with ``effective'' acceleration $q\ensuremath{\equiv}\sqrt{{a}^{2}+\mathrm{\ensuremath{\Lambda}}}$. However, no such mapping generically exists for the entanglement between probes. Our results suggest that entanglement exhibits independent variations with changes in acceleration and curvature depending on different configurations of detector motion.