| Login |
| Description | Joint Theory Seminar Speaker: Richard Holman Title: Effective Theory in a Time Dependent World Host: John Terning Room: 432 Abstract: We use the in-in or Schwinger-Keldysh formalism to explore the construction and interpretation of effective field theories for time-dependent systems evolving out of equilibrium. Starting with a simple model consisting of a heavy and a light scalar field taken to be in their free vacuum states at a finite initial time, we study the effects from the heavy field on the dynamics of the light field by analyzing the equation of motion for the expectation value of the light background field. New terms appear which cannot arise from a local action of an effective field theory in terms of the light field, though they disappear in the adiabatic limit. We discuss the origins of these terms as well as their possible implications for time dependent situations such as inflation. |
| Date | Mon, March 4, 2013 |
| Time | 5:30am-6:30am PST |
| Duration | 1 hour |
| Access | Public |
| Created by | High-Energy Seminars |
| Updated | Mon, February 25, 2013 1:34pm PST |
| Send Reminder | Yes - 0 days 4 hour 0 minutes before start |
