Jan 25 – 27, 2023
Lindenberg cultuurhuis
Europe/Amsterdam timezone

Should one expect a unique vacuum in Quantum Gravity?

Jan 26, 2023, 11:00 AM
Valkhofzaal (Lindenberg cultuurhuis)


Lindenberg cultuurhuis

Ridderstraat 23, 6511 TM Nijmegen


Prof. Max Niedermaier (University of Pittsburgh)


The talk examines possible answers to the question raised in functional integral based formulations of Quantum Gravity. These include Lorentzian signature perturbation theory and non-perturbative settings starting from the Euclidean propagation kernel. In the latter framework the "no-boundary" proposal is reexamined in relation to the (non-)normalizability of ground state wave function(s). Finally, noting that even after a complete gauge fixing residual global invariances may survive, their role in triggering vacuum degeneracy is outlined.

Primary author

Prof. Max Niedermaier (University of Pittsburgh)

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