Analytic Hadamard states, Calderón projectors and Wick rotation near analytic Cauchy surfaces
Résumé
We consider the Klein-Gordon equation on analytic space-times with an analytic Cauchy surface. In this setting, we prove the existence of pure analytic Hadamard states. The proof is based on considering an elliptic operator obtained by Wick rotating the Klein-Gordon operator in a neighborhood of a Cauchy hypersurface. The Cauchy data of Hadamard two-point functions are constructed as Calderón projectors (suitably generalized if the hypersurface is non-compact) for the elliptic operator.
Domaines
Physique mathématique [math-ph]
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