Particle creation due to tachyonic instability in relativistic stars

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorLandulfo, A. G.S.-
Autor(es): dc.creatorLima, W. C.C.-
Autor(es): dc.creatorMatsas, G. E.A.-
Autor(es): dc.creatorVanzella, D. A.T.-
Data de aceite: dc.date.accessioned2025-08-21T20:52:02Z-
Data de disponibilização: dc.date.available2025-08-21T20:52:02Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2012-11-07-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.86.104025-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/227033-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/227033-
Descrição: dc.descriptionDense enough compact objects were recently shown to lead to an exponentially fast increase of the vacuum energy density for some free scalar fields properly coupled to the spacetime curvature as a consequence of a tachyonic-like instability. Once the effect is triggered, the star energy density would be overwhelmed by the vacuum energy density in a few milliseconds. This demands that eventually geometry and field evolve to a new configuration to bring the vacuum back to a stationary regime. Here, we show that the vacuum fluctuations built up during the unstable epoch lead to particle creation in the final stationary state when the tachyonic instability ceases. The amount of created particles depends mostly on the duration of the unstable epoch and final stationary configuration, which are open issues at this point. We emphasize that the particle creation coming from the tachyonic instability will occur even in the adiabatic limit, where the spacetime geometry changes arbitrarily slowly, and therefore is quite distinct from the usual particle creation due to the change in the background geometry. © 2012 American Physical Society.-
Descrição: dc.descriptionInstituto de Física de São Carlos Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, São Paulo-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271, 01140-070 São Paulo, São Paulo-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista, Rua Dr. Bento Teobaldo Ferraz, 271, 01140-070 São Paulo, São Paulo-
Idioma: dc.languageen-
Relação: dc.relationPhysical Review D - Particles, Fields, Gravitation and Cosmology-
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Título: dc.titleParticle creation due to tachyonic instability in relativistic stars-
Tipo de arquivo: dc.typelivro digital-
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