On the structure of the vacuum state in general boundary quantum field theory
classification
✦ hep-th
keywords
generalboundaryfieldgaussianstructurevacuumappearingcurved
read the original abstract
We quantize a real massive Klein-Gordon field in curved spacetimes within the general boundary formulation. The vacuum wave function is given by a Gaussian in the Schr\"odinger representation and we study the general structure of the operator appearing in the Gaussian. We show that it obeys a Riccati equation and we provide the general solution.
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