PIRSA:21040007 Scientific Series Quantum Gravity

DOI10.48660/21040007

Series: Quantum Gravity

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}}
}

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.

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