BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-1483
DTSTART:20090326T210000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T055328Z
LAST-MODIFIED:20090302T034401Z
LOCATION:4274 Chamberlin
SUMMARY:M-flation\, NPAC (Nuclear/Particle/Astro/Cosmo) Forum\, Amjad 
 Ashoorioon\, University of Michigan
DESCRIPTION:We propose an inflationary scenario\, M-flation\, in which
  inflation is driven by three NXN Hermitian matrices Phi_i\, i=1\,2\,3
 . The inflationary potential of our model in the most general form inv
 olves a commutator squared term\, a cubic term involving product of a 
 commutator with the field and a quadratic  ``mass'' term. This class o
 f potentials are strongly motivated by string theory. We show that one
  can consistently restrict the classical dynamics to a sector in which
  the Phi_i are proportional to the NXN irreducible representation of S
 U(2). In this sector our model effectively behaves as an N-flation  wi
 th order N^2 number of fields\, and therefore remove the fine-tunings 
 associated with super-Planckian field and/or unnaturally small couplin
 gs in the chaotic type inflationry scenarios. Due to the matrix nature
  of the scalars 3N^2-1$ other scalar fields also affect the inflationa
 ry dynamics. These have the observational effects such as production o
 f entropy (non-adiabatic) perturbations on cosmic microwave background
 . Moreover\, the existence of these other scalars provides us with a n
 atural preheating model for our setup.<br><br>
\n
URL:https://www.physics.wisc.edu/events/?id=1483
END:VEVENT
END:VCALENDAR