De Sitter Bra-Ket wormholes

De Sitter Bra-Ket wormholes

Blog Article

Abstract We study a model for the initial state of the universe based on a gravitational path integral that includes connected geometries which simultaneously produce bra and ket of the wave function.We argue that a natural object to describe this state is the Wigner distribution, which is a function on a classical phase space obtained by a certain integral transform USB Drives of the density matrix.We work with Lorentzian de Sitter Jackiw-Teitelboim gravity in which we find semiclassical saddle-points for pure gravity, as well as when we include matter components such as a CFT and a classical inflaton field.We also discuss different choices of fixing time reparametrizations.

In the regime of large universes our connected geometry dominates over the Hartle-Hawking saddle and gives a distribution that SWEATPANTS has a meaningful probabilistic interpretation for local observables.It does not, however, give a normalizable probability measure on the entire phase space of the theory.