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We consider massive Dirac equations on asymptotically static spacetimes witha Cauchy surface of bounded geometry. We prove that the associated quantizedDirac field admits in and out states, which are asymptotic vacuum states whensome time coordinate tends to $\mp\infty$. We also show that the in /out statesare Hadamard states.(new version with some typos corrected).

Hadamard property of the in and out states for Dirac fields on asymptotically static spacetimes