PSU Mark
Eberly College of Science Mathematics Department

Meeting Details

For more information about this meeting, contact Ping Xu, Mathieu Stienon, Nigel Higson.

Title:Time and almost-positive linear functions on algebras
Seminar:GAP Seminar
Speaker:Martin Bojowald, Penn State University
One of the apparent incompatibilities between quantum mechanics and general relativity is the treatment of time as an eternal parameter in the former and as a local coordinate in the latter theory. I will describe recent ideas which try to overcome this problem by taking the algebraic view of quantum states as linear functionals on the algebra of observables. A time variable may then be taken as an element of the algebra in order to describe evolution locally, while transformations between different time choices must be made for long-term evolution resembling a manifold picture. Algebraic states that include time in this sense violate the usual positivity condition, but still obey a weaker form of almost-positive linear functionals.

Room Reservation Information

Room Number:MB106
Date:02 / 03 / 2015
Time:02:30pm - 03:30pm