Charged vs. Neutral particle creation in expanding Universes: A Quantum Field Theoretic Treatment

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dc.creatorBambah, B.
dc.creatorMukku, C.
dc.date2003-07-30
dc.date.accessioned2026-07-07T04:15:33Z
dc.date.available2026-07-07T04:15:33Z
dc.descriptionA complete quantum field theoretic study of charged and neutral particle creation in a rapidly/adiabatically expanding Friedman-Robertson-Walker metric for an O(4) scalar field theory with quartic interactions (admitting a phase transition) is given. Quantization is carried out by inclusion of quantum fluctuations. We show that the quantized Hamiltonian admits an su(1,1) invariance. The squeezing transformation diagonalizes the Hamiltonian and shows that the dynamical states are squeezed states. Allowing for different forms of the expansion parameter, we show how the neutral and charged particle production rates change as the expansion is rapid or adiabatic. The effects of the expansion rate versus the symmetry restoration rate on the squeezing parameter is shown.
dc.descriptionPresented by B. Bambah at the International Congress of Mathematical Physics, 2003 held in Lisbon, Portugal, July 2003
dc.identifierhttps://arxiv.org/abs/hep-th/0307286
dc.identifierhttp://arxiv.org/abs/hep-th/0307286
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/52047
dc.subjectHigh Energy Physics - Theory
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleCharged vs. Neutral particle creation in expanding Universes: A Quantum Field Theoretic Treatment
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