two gamma event

Rideout
Feb
2017

David Rideout

Evaluating the Gravitational Path Sum in Causal Set Quantum Gravity

Feb. 13, 2017

pdf file mp4 file

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.

Time: 1:30pm-2:30pm

calendar page

































 
2017/feb/rideout.txt ยท Last modified: 2017/01/24 17:03 (external edit)
Recent changes RSS feed Creative Commons License Powered by PHP