High Energy Theory Seminar
Online and In-Person Event
Quantum mechanics and observers for gravity in a closed universe
Misha Usatyuk,
KITP, UC Santa Barbara,
Recent arguments based on the gravitational path integral have given fairly compelling evidence that the Hilbert space of quantum gravity in a closed universe is one-dimensional. This presents a problem: how can this be consistent with the complexity of our own experiences? We propose an observer must be included, and give a framework and set of rules to include an observer in the closed universe. With the observer, the dimensionality of the closed universe Hilbert space becomes e^{S_Ob} where S_Ob is the number of degrees of freedom of the observer.
The talk is in 469 Lauritsen.
Contact [email protected] for Zoom information.
For more information, please visit https://www.theory.caltech.edu/seminars/high-energy-theory-informal-meeting.