Emergence of Fluctuations from a Tachyonic Big Bang

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dc.creatorBrandenberger, Robert H.
dc.creatorFrey, Andrew R.
dc.creatorKanno, Sugumi
dc.date2007-06-08
dc.date2007-08-19
dc.date.accessioned2026-07-07T11:56:55Z
dc.date.available2026-07-07T11:56:55Z
dc.descriptionIt 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 tne 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.
dc.description8pg, RevTeX4, 1 fig, v2. added refs, v3. added small clarification, 1 ref
dc.identifierhttps://arxiv.org/abs/0706.1104
dc.identifierhttp://arxiv.org/abs/0706.1104
dc.identifierPhys.Rev.D76:083524,2007
dc.identifierdoi:10.1103/PhysRevD.76.083524
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205705
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleEmergence of Fluctuations from a Tachyonic Big Bang
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