Natural ultraviolet cutoffs in expanding spacetimes

Workshop at the Perimeter Institute for Theoretical Physics (PI), September 5-8, 2006

Perimeter Institute for Theoretical Physics and Departments of Applied Mathematics and Physics, University of Waterloo

The PI bistro will offer a daily lunch buffet. For a list of restaurants, see the welcome package. We recommend two close-by sites for post-dinner discussions, the Symposium Cafe, and the Sole Restaurant and Wine Bar.

Tuesday, September 5

  • 9:00-10:30 am: R. Parentani, "Mode creation in expanding universes, through dissipative effects"
  • 11:00 am-12:30 pm: B. Foster, "Quantum Field Theory (QFT) on a growing lattice"
  • Lunch break
  • 2:00-3:30 pm: R. Sorkin, "A discrete Lorentz-invariant wave equation and its continuum limit"
  • 4:00-5:30 pm: L. Smolin et al, "Insights from background independent approaches to quantum gravity"

Wednesday, September 6

  • 9:00-10:30 am: J. Niemeyer, "Questions about high-k physics in expanding spacetimes"
  • 11:00 am-12:30 pm: J. Martin, "Inflationary cosmological perturbations of quantum-mechanical origin
  • Free time
  • Note: PI Colloquium, 2:00-3:00 pm: T. Jacobson, "Thermodynamics of spacetime"
  • 4:00-4:30 pm: L. Lorenz, "Initial conditions in the presence of a UV cutoff: modified mode equations in inflation"
  • 4:30-5:00 pm: R. Martin, "Towards a generally covariant cutoff using sampling theory"
  • 5:00-5:45 pm: T. Jacobson, "Thoughts on vacuum growth"
  • 5:45-6:30 pm: Wine and cheese in PI's Black Hole Bistro

Thursday, September 7

  • 9:00-10:30 am: K. Schalm, to be announced
  • 11:00 am-12:30 pm: H. Collins, "The effective theory of an initial state"
  • Lunch break
  • 2:00-3:30 pm: R. Brout, "Creation of space, field energy and modes"
  • 4:00-5:30 pm: R. Brandenberger, "Trans-Planckian issues for inflationary cosmology"

Friday, September 8

  • 9:00-10:30 am: S. Hossenfelder, to be announced
  • 11:00-11:45 am: U. Harbach, "Generalized uncertainty principle"
  • End of workshop