Artículos de revistas
Nonminimal Coupling, Exponential Potentials And The W < - 1 Regime Of Dark Energy
Registro en:
Physical Review D - Particles, Fields, Gravitation And Cosmology. , v. 70, n. 8, p. 87302 - 1-087302-4, 2004.
5562821
10.1103/PhysRevD.70.087302
2-s2.0-84927742223
Autor
Garvalho F.C.
Saa A.
Institución
Resumen
Recent observations and theoretical considerations have motivated the study of models for dark energy with equation of state characterized by a parameter w = p/ρ < - 1. Such models, however, are usually believed to be inviable due to their instabilities against classical perturbations or potentially catastrophic vacuum decays. In this Brief Report, we show that a simple quintessential model with potential V(φ) = Ae-σφ and a gravitational coupling of the form (1 + |ξ|φ2)R can exhibit, for large sets of initial conditions, asymptotic de Sitter behavior with w < - 1 regimes. Nevertheless, the model is indeed stable at classical and quantum level. 70 8 87302 1-087302-4 Riess, A.G., (1998) Astron. J., 116, p. 1009 Perlmutter, S., (1999) Astrophys. J., 517, p. 565 Peebles, P.J., Ratra, B., (2003) Rev. Mod. Phys., 75, p. 559 Caldwell, R.R., Dave, R., Steinhardt, P.J., (1998) Phys. Rev. Lett., 80, p. 1582 Wang, L.-M., Caldwell, R.R., Ostriker, J.P., Steinhardt, P.J., (2000) Astrophys. J., 530, p. 17 Steinhardt, P.J., Wang, L.-M., Zlatev, I., (1999) Phys. Rev. D, 59, p. 123504 Alcaniz, J.S., (2004) Phys. Rev. D, 69, p. 083521 Faraoni, V., (2002) Int. J. Mod. Phys. D, 11, p. 471 (2003) Phys. Rev. D, 68, p. 063508 Riess, A.C., (2004) Astrophys. J., 607, p. 665 Carroll, S.M., Hoffman, M., Trodden, M., (2003) Phys. Rev. D, 68, p. 023509 Hsu, S.D.H., Jenkins, A., Wise, M.B., (2004) Phys. Lett. B, 597, p. 270 Rubano, C., Scudellaro, P., (2002) Gen. Relativ. Gravit., 34, p. 307 Rubano, C., (2004) Phys. Rev. D, 69, p. 103510 Halliwell, J.J., (1987) Phys. Lett. B, 185, p. 341 Shafi, Q., Wetterich, C., (1987) Nucl. Phys., B289, p. 787 Neupane, I., (2004) Classical Quantum Gravity, 21, p. 4383 Gunzig, E., Saa, A., Brenig, L., Faraoni, V., Rocha Filho, T.M., Figueiredo, A., (2001) Phys. Rev. D, 63, p. 067301 (2001) Int. J. Theor. Phys., 40, p. 2295 Abramo, L.R., Brenig, L., Gunzig, E., Saa, A., (2003) Phys. Rev. D, 67, p. 027301 (2003) Int. J. Theor. Phys., 42, p. 1145 E. Gunzig and A. Saa, gr-qc/0406068 gr-qc/0406069Baccigalupi, C., Matarrese, S., Perrota, F., (2000) Phys. Rev. D, 62, p. 123510 Bartolo, N., Pietroni, M., (2000) Phys. Rev. D, 61, p. 023518 Ford, L.H., Roman, T.A., (2001) Phys. Rev. D, 64, p. 024023 Torres, D.F., (2002) Phys. Rev. D, 66, p. 043522 Abramowitz, M., Stegun, I., (1965) Handbook of Mathematical Functions, , Dover, New York Faraoni, V., (2004) Phys. Rev. D, 70, p. 044037 Faraoni, V., (2001) Int. J. Theor. Phys., 40, p. 2259 Barvinsky, A.O., (1999) Nucl. Phys., B561, p. 159