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School of Astronomy (SoA) Weekly
Seminar
Tachyonic
Resonance Preheating in Expanding
Universe
Ali Akbar
Abolhasani (SUT & IPM)
Abstract:
In my talk I'll briefly review
general aspects of "Reheating" .
After that I'll go
on to our recent paper "Tachyonic
Resonance Preheating in
Expanding Universe". In this paper the
tachyonic resonance preheating
generated from the bosonic trilinear
\phi \chi^2 interactions in an expanding
Universe is studied. We find that the
occupation number of the produced
particles has a non-linear exponential
growth with exponent ~ x3/2, where x
is the conformal time. This should be
contrasted with preheating from a
periodic resonant source, where the
occupation number has a linear
exponential
growth.
Wednesday /
3-Feb.-2010 / 14-Bahman-1388/ 2:00 PM
IPM Larak Building,
School of Astronomy
Address: Larak Garden,
opposite Araj, Artesh
Highway,Tehran, Iran
E-mail: astro(at) ipm.ir
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