The Schrödinger wave functional and vacuum states in curved spacetime II: Boundaries and foliations Original Research Article

In a companion paper, general solutions for the vacuum wave functionals in the Schrödinger picture were given for a variety of classes of curved spacetimes. Here, we describe a number of simple examples which illustrate how the presence of spacetime boundaries influences the vacuum wave functional and how physical quantities are independent of the choice of spacetime foliation used in the Schrödinger approach despite the foliation dependence of the wave functionals themselves.