PIRSA:21040007

A Generalized Hartle-Hawking State

Alexander, S. (2021). A Generalized Hartle-Hawking State. Perimeter Institute. https://pirsa.org/21040007

Alexander, Stephon. A Generalized Hartle-Hawking State. Perimeter Institute, Apr. 01, 2021, https://pirsa.org/21040007 

          @misc{ pirsa_PIRSA:21040007,
            doi = {10.48660/21040007},
            url = {https://pirsa.org/21040007},
            author = {Alexander, Stephon},
            keywords = {Quantum Gravity},
            language = {en},
            title = {A Generalized Hartle-Hawking State},
            publisher = {Perimeter Institute},
            year = {2021},
            month = {apr},
            note = {PIRSA:21040007 see, \url{https://pirsa.org}}
          }

Stephon Alexander

Brown University

Talk number
PIRSA:21040007
Collection
Talk Type
Subject
Abstract

The Hartle-Hawking-Vilenkin state is defined on mini-superspace and is semiclassically related to inflationary theory.  However, the state suffers a few problems connected to the path integral of Euclidean or the Lorentzian measure of metrics.  In this talk, we will explore a way around these issues by working in the (Ashtekar) connection representation, a real Kodama-Chern-Simons state.  We find a generalized "Fourier Transform" that related the Chern-Simons-Kodama state to the Hartle-Hawking state beyond mini-superspace.  We end with some discussion and open ended questions for cosmology and quantum gravity.