Emergence of fluctuations from a tachyonic big bang
Journal Article
·
· Physical Review. D, Particles Fields
- Department of Physics, McGill University, Montreal, Quebec, H3A 2T8 (Canada)
It has recently been speculated that the end state of a collapsing universe is a tachyonic big crunch. The time reversal of this process would be the emergence of an expanding universe from a tachyonic big bang. In this framework, we study the emergence of cosmological fluctuations. In particular, we compare the amplitude of the perturbations at the end of the tachyon phase with what would be obtained assuming the usual vacuum initial conditions. We find that cosmological fluctuations emerge in a thermal state. We comment on the relation to the trans-Planckian problem of inflationary cosmology.
- OSTI ID:
- 21032447
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 8 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Classical and quantum Big Brake cosmology for scalar field and tachyonic models
Big bang and big crunch in matrix string theory
The Big Bang Theory
Journal Article
·
Wed Feb 20 23:00:00 EST 2013
· AIP Conference Proceedings
·
OSTI ID:22113530
Big bang and big crunch in matrix string theory
Journal Article
·
Sun Apr 15 00:00:00 EDT 2007
· Physical Review. D, Particles Fields
·
OSTI ID:21020426
The Big Bang Theory
Multimedia
·
Tue Sep 30 00:00:00 EDT 2014
·
OSTI ID:1190775