Simon Fraser University
SFU Cosmology Seminars

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Tuesday, 3 April 2007, 14:00 in SSB7109

Prof. Christian Armendariz-Picon (Syracuse)

Do quantum excitations of the inflaton decay?

The properties of the primordial perturbations seeded during a stage of inflation are determined by the quantum state of the inflaton. This state is usually assumed to be the "vacuum", since one expects excited states to decay into the state of lowest energy. In the talk I discuss whether this assumption holds in the presence of a short-distance cut-off. I describe the calculation of transition probabilities between excited states and the vacuum, and discuss the implications of the results that I obtain.

Seminars in 2006:

2006-10-04 12:45 in P8445A - Serge Winitzki (Ludwig Maximilians University, Munich): Predictions in eternally inflating universe
2006-11-22 12:45 in P8445B - Ingrid Stairs (UBC): Relativistic binary pulsars
2006-11-23 14:00 in P8445B - Veselin Filev (University of Southern California): Adding flavors in AdS/CFT correspondence
2006-11-30 14:00 in P8445B - Marco Peloso (University of Minnesota): The role of SUSY flat directions in reheating
2006-12-05 13:00 in P8445B - Jasper Wall (UBC): Submillimetre galaxies and star-formation in the early Universe
2007-01-11 13:00 in P8445B - Krzysztof Sliwa (Tufts University): Supersymmetry for particle physicists
2007-01-16 14:00 in SSB7109 - Bojan Losic (University of Alberta): Aspects of nonlinear perturbation theory in cosmology
2007-02-01 13:00 in P8445B - Adam Moss (UBC): Dark energy and the rubber band
2007-03-08 13:00 in P8445B - Catherine Heymans (UBC): Probing dark matter and dark energy with weak gravitational lensing
2007-03-22 13:00 in P8445B - Ira Wasserman (Cornell): The neutron star in 1930 -- and today (special colloquium)
2007-03-23 12:30 in P8445B - Ira Wasserman (Cornell): Dynamics of the r mode instability of neutron stars
2007-03-27 14:00 in SSB7109 - Shinji Mukohyama (University of Tokyo): Cosmology with warped flux compactification
2007-04-03 14:00 in SSB7109 - Christian Armendariz-Picon (Syracuse): Do quantum excitations of the inflaton decay?
2007-04-12 13:00 in P8445B - David Rapetti (KIPAC/Stanford): X-ray galaxy clusters as cosmological probes
2007-04-19 13:00 in P8445B - Eric Peng (HIA/DAO, Victoria): Globular cluster systems and the early evolution of galaxies
2007-04-24 14:00 in P8445B - Evgeny Sorkin (UBC): The pinching black strings
2007-05-03 13:00 in P8445B - Tanmay Vachaspati (Case Western Reserve University): Formation of black holes

[ See complete seminar archives | iCal feed ]

Modified by Andrei Frolov <frolov@sfu.ca> on 2023-11-01