Stochastic motion in an expanding noncommutative fluid
| Autor: | Francisco A. Brito, M. A. Anacleto, E. J. B. Ferreira, E. Passos, C. H. G. Bessa |
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| Rok vydání: | 2021 |
| Předmět: |
High Energy Physics - Theory
Physics Geodesic Spacetime 010308 nuclear & particles physics Scalar (mathematics) FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences Noncommutative geometry General Relativity and Quantum Cosmology Massless particle High Energy Physics - Theory (hep-th) 0103 physical sciences Higgs boson Test particle 010306 general physics Scalar field Mathematical physics |
| Zdroj: | Physical Review |
| ISSN: | 2470-0029 2470-0010 |
| Popis: | A model for an expanding noncommutative acoustic fluid analogous to a Friedmann-Robertson-Walker geometry is derived. For this purpose, a noncommutative Abelian Higgs model is considered in a (3+1)-dimensional spacetime. In this scenario, we analyze the motion of test particles in this fluid. The study considers a scalar test particle coupled to a quantized fluctuating massless scalar field. For all cases studied, we find corrections due to the noncommutativity in the mean squared velocity of the particles. The nonzero velocity dispersion for particles that are free to move on geodesics disagrees with the null result found previously in the literature for expanding commutative fluid. Comment: 16 pages, 4 figures, version accepted in PRD |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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