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| Description | Joint Theory Seminar Speaker: David Rideout Title: Evaluating the Gravitational Path Sum in Causal Set Quantum Gravity Host: Steve Carlip Room: 432 Abstract: The functional integral for gravity poses numerous challenges, one of which is simply deciding the nature of the set of spacetime histories over which one should sum. I will propose an answer to this question in terms of a natural discretization of gravity, which is based on causal structure and the imposition of a finite number of degrees of freedom in a compact region of spacetime. Given a recently discovered form for an action functional on such histories, I will present a numerical exploration of some features of the resulting functional integral, including a characterization of the phase space of the analytically continued sum. The results point to evidence that the dynamically preferred spacetime histories have a two dimensional character as one approaches the Planck scale. |
| Date | Mon, February 13, 2017 |
| Time | 5:30am-6:30am PST |
| Duration | 1 hour |
| Access | Public |
| Created by | High-Energy Seminars |
| Updated | Fri, January 20, 2017 7:22am PST |
| Send Reminder | Yes - 3 days 4 hour 0 minutes before start |
