Could thermal fluctuations seed cosmic structure?

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dc.creatorMagueijo, Joao
dc.creatorPogosian, Levon
dc.date2002-11-14
dc.date2003-01-16
dc.date.accessioned2026-07-07T12:00:52Z
dc.date.available2026-07-07T12:00:52Z
dc.descriptionWe examine the possibility that thermal, rather than quantum, fluctuations are responsible for seeding the structure of our universe. We find that while the thermalization condition leads to nearly Gaussian statistics, a Harrisson-Zeldovich spectrum for the primordial fluctuations can only be achieved in very special circumstances. These depend on whether the universe gets hotter or colder in time, while the modes are leaving the horizon. In the latter case we find a no-go theorem which can only be avoided if the fundamental degrees of freedom are not particle-like, such as in string gases near the Hagedorn phase transition. The former case is less forbidding, and we suggest two potentially successful ``warming universe'' scenarios. One makes use of the Phoenix universe, the other of ``phantom'' matter.
dc.descriptionminor corrections made, references added, matches the version accepted to PRD
dc.identifierhttps://arxiv.org/abs/astro-ph/0211337
dc.identifierhttp://arxiv.org/abs/astro-ph/0211337
dc.identifierPhys.Rev.D67:043518,2003
dc.identifierdoi:10.1103/PhysRevD.67.043518
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206929
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleCould thermal fluctuations seed cosmic structure?
dc.typetext

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