logo biblio digital exactas
logo twitter logo instagram logo whatsapp logo mail

Navegar

Colección

Datos Estadísticas

Conferencia

Chimento, L.P.; Devecchi, F.P.; Forte, M.; Kremer, G.M.; Ribas, M.O.; Samojeden, L.L. "Fermionic cosmologies" (2011) Journal of Physics: Conference Series. 306(1)
Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

In this work we review if fermionic sources could be responsible for accelerated periods during the evolution of a FRW universe. In a first attempt, besides the fermionic source, a matter constituent would answer for the decelerated periods. The coupled differential equations that emerge from the field equations are integrated numerically. The self-interaction potential of the fermionic field is considered as a function of the scalar and pseudo-scalar invariants. It is shown that the fermionic field could behave like an inflaton field in the early universe, giving place to a transition to a matter dominated (decelerated) period. In a second formulation we turn our attention to analytical results, specifically using the idea of form-invariance transformations. These transformations can be used for obtaining accelerated cosmologies starting with conventional cosmological models. Here we reconsider the scalar field case and extend the discussion to fermionic fields. Finally we investigate the role of a Dirac field in a Brans-Dicke (BD) context. The results show that this source, in combination with the BD scalar, promote a final eternal accelerated era, after a matter dominated period. © Published under licence by IOP Publishing Ltd.

Registro:

Documento: Conferencia
Título:Fermionic cosmologies
Autor:Chimento, L.P.; Devecchi, F.P.; Forte, M.; Kremer, G.M.; Ribas, M.O.; Samojeden, L.L.
Filiación:Physics Department, UBA, 1428 Buenos Aires, Argentina
Physics Department, UFPR, 81531-990 Curitiba, Brazil
Palabras clave:Differential equations; Quantum theory; Analytical results; Cosmological models; Coupled differential equations; Early universe; Field equation; Form invariance; Scalar invariants; Self-interactions; Cosmology
Año:2011
Volumen:306
Número:1
DOI: http://dx.doi.org/10.1088/1742-6596/306/1/012052
Título revista:Journal of Physics: Conference Series
Título revista abreviado:J. Phys. Conf. Ser.
ISSN:17426588
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v306_n1_p_Chimento

Referencias:

  • Peebles, P.J., Ratra, S., (1988) Astrophys. J. Lett. L, 17, p. 325
  • Copeland, E., Sami, M., Tsujikawa, S., (2006) Int. J. Mod. Phys. D, 15 (10), p. 1573
  • Capozziello, S., De Laurentis, S., Nojiri, S., Odintsov, S., (2009) Phys.Rev. D, 79 (12), p. 124007
  • Baccigalupi, C., Liddle, A.R., Perrotta, F., (2005) Phys Rev. D, 71 (10), p. 104025
  • Obukhov, Y.N., (1993) Phys. Lett. A, 182 (2-3), p. 214
  • Saha, B., Shikin, G.N., (1997) Gen. Relativ. Gravit., 29 (9), p. 1099
  • Armendriz-Picón, C., Greene, P.B., (2003) Gen. Relativ. Gravit., 35 (9), p. 1637
  • Saha, B., (2006) Phys. Rev. D, 74 (12), p. 124030
  • Ribas, M.O., Devecchi, F.P., Kremer, G.M., (2005) Phys. Rev. D, 72 (12), p. 123502
  • Ribas, M.O., Devecchi, F.P., Kremer, G.M., (2008) Europhys. Lett., p. 14001
  • Samojeden, L.L., Devecchi, F.P., Kremer, G.M., (2010) Phys. Rev., 81, p. 27301
  • Saha, B., Boyadjiev, T., (2004) Phys. Rev. D, 69 (12), p. 124010
  • Nambu, Y., Jona-Lasinio, G., (1961) Phys. Rev., 122 (1), p. 345
  • Wald, R.M., (1984) General Relativity, , Chicago: UCP
  • Weinberg, S., (1972) Gravitation and Cosmology, , NYC: Wiley
  • Ryder, L., (1996) Quantum Field Theory, , Cambridge: Cambridge
  • Birrel, N.D., Davies, P.C., (1982) Quantum Fields in Curved Space-time, , Cambridge: Cambridge
  • Will, C.M., (1994) Theory and Experiment in Gravitational Physics, , Cambridge: Cambridge
  • Kremer, G.M., Devecchi, F.P., (2003) Phys. Rev. D, 67 (4), p. 047301
  • Chimento, L.P., (2002) Phys. Rev. D, 65 (6), p. 063517
  • Chimento, L.P., Lazkoz, R., (2003) Phys. Rev. Lett., 91 (21), p. 211301
  • Chimento, L.P., Devecchi, F.P., Forte, M., Kremer, G.M., Ribas, M.O., (2008) Phys. Rev. D, 96, p. 211301
  • Hoffman, M., Trodden, M., (2003) Phys. Rev. D, 68 (2), p. 023509
  • Caldwell, R.R., (2002) Phys. Lett. B, 545 (1-2), p. 23
  • Mersini, L., Bastero-Gil, M., Kanti, P., (2001) Phys. Rev. D, 64 (4), p. 043508
  • Aguirregabiria, J.M., Chimento, L.P., Jakubi, A., Lazkoz, R., (2003) Phys. Rev. D, 67 (8), p. 083518
  • Veneziano, G., (1991) Phys. Lett. B, 265 (3-4), p. 287

Citas:

---------- APA ----------
Chimento, L.P., Devecchi, F.P., Forte, M., Kremer, G.M., Ribas, M.O. & Samojeden, L.L. (2011) . Fermionic cosmologies. Journal of Physics: Conference Series, 306(1).
http://dx.doi.org/10.1088/1742-6596/306/1/012052
---------- CHICAGO ----------
Chimento, L.P., Devecchi, F.P., Forte, M., Kremer, G.M., Ribas, M.O., Samojeden, L.L. "Fermionic cosmologies" . Journal of Physics: Conference Series 306, no. 1 (2011).
http://dx.doi.org/10.1088/1742-6596/306/1/012052
---------- MLA ----------
Chimento, L.P., Devecchi, F.P., Forte, M., Kremer, G.M., Ribas, M.O., Samojeden, L.L. "Fermionic cosmologies" . Journal of Physics: Conference Series, vol. 306, no. 1, 2011.
http://dx.doi.org/10.1088/1742-6596/306/1/012052
---------- VANCOUVER ----------
Chimento, L.P., Devecchi, F.P., Forte, M., Kremer, G.M., Ribas, M.O., Samojeden, L.L. Fermionic cosmologies. J. Phys. Conf. Ser. 2011;306(1).
http://dx.doi.org/10.1088/1742-6596/306/1/012052