First order nonthermal phase transition after preheating

Khlebnikov, S.; Kofman, L.; Linde, Andrei D.; Tkachev, I.

doi:10.1103/PhysRevLett.81.2012

First order nonthermal phase transition after preheating

S. Khlebnikov
(
- Purdue U.
)
,
L. Kofman
(
- Hawaii U.
)
,
Andrei D. Linde
(
- Stanford U., Phys. Dept.
)
,
I. Tkachev
(
- Purdue U. and
- Moscow, INR
)

Apr, 1998

4 pages

Published in:

Phys.Rev.Lett. 81 (1998) 2012-2015

e-Print:

hep-ph/9804425 [hep-ph]

DOI:

10.1103/PhysRevLett.81.2012

Report number:

PURD-TH-98-06,
UH-IFA-98-29,
SU-ITP-98-29

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Abstract:

During preheating after inflation, parametric resonance rapidly generates very large fluctuations of scalar fields. In models where the inflaton field

\phi

oscillates in a double-well potential and interacts with another scalar field

X

, fluctuations of X can keep the \phi to -\phi symmetry temporarily restored. If the coupling of \phi to X is much stronger than the inflaton self-coupling, the subsequent symmetry breaking is a first-order phase transition. We demonstrate the existence of this nonthermal phase transition with lattice simulations of the full nonlinear dynamics of the interacting fields. In particular, we observe nucleation of an expanding bubble.

inflation
field theory: scalar
inflaton: oscillation
field theory: fluctuation
critical phenomena
bubble: production
zero mode
numerical calculations: Monte Carlo

References(16)

Figures(0)

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Lev Kofman
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(
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)
,
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(
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)

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(
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(
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)

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(
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(
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)
,
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(
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)
,
Igor I. Tkachev
(
- Ohio State U. and
- Moscow, INR
)

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•
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