Perturbations in a non-singular bouncing Universe. (English) Zbl 1038.83029
Summary: We complement the low-energy gravi-dilaton effective action of string theory with a non-local, general-covariant dilaton potential, and obtain homogeneous solutions describing a non-singular (bouncing-curvature) cosmology. We then compute, both analytically and numerically, the spectrum of amplified scalar and tensor perturbations, and draw some general lessons on how to extract observable consequences from pre-big bang and ekpyrotic scenarios.
MSC:
| 83E05 | Geometrodynamics and the holographic principle |
| 83E30 | String and superstring theories in gravitational theory |
References:
| [1] | Veneziano, G., Phys. Lett. B, 265, 287 (1991) |
| [2] | Gasperini, M.; Veneziano, G., Astropart. Phys., 1, 317 (1993) |
| [3] | Gasperini, M.; Veneziano, G., Phys. Rep., 373, 1 (2003) |
| [4] | Khouri, J.; Ovrut, B. A.; Seiberg, N.; Steinhardt, P. J.; Turok, N., Phys. Rev. D, 65, 086007 (2002) |
| [5] | Gasperini, M.; Veneziano, G., Phys. Rev. D, 50, 2519 (1994) |
| [6] | Brustein, R.; Gasperini, M.; Giovannini, M.; Mukhanov, V.; Veneziano, G., Phys. Rev. D, 51, 6744 (1995) |
| [7] | Gasperini, M.; Giovannini, M., Phys. Rev. D, 47, 1519 (1993) |
| [8] | Brustein, R.; Gasperini, M.; Giovannini, M.; Veneziano, G., Phys. Lett. B, 361, 45 (1995) |
| [9] | Copeland, E. J.; Lidsey, J. E.; Wands, D., Nucl. Phys. B, 506, 407 (1997) · Zbl 0925.83093 |
| [10] | Moroi, T.; Takahashi, T., Phys. Lett. B, 522, 215 (2001) · Zbl 0977.83120 |
| [11] | Bozza, V.; Gasperini, M.; Giovannini, M.; Veneziano, G., Phys. Rev. D, 67, 063514 (2003) |
| [12] | Gratton, S.; Khoury, J.; Steinhardt, P. J.; Turok, N. |
| [13] | Cartier, C.; Durrer, R.; Copeland, E. J., Phys. Rev. D, 67, 103517 (2003) |
| [14] | M. Gasperini, M. Giovannini, G. Veneziano, in preparation; M. Gasperini, M. Giovannini, G. Veneziano, in preparation |
| [15] | Brustein, R.; Veneziano, G., Phys. Lett. B, 329, 429 (1994) |
| [16] | Meissner, K. A.; Veneziano, G., Phys. Lett. B, 267, 33 (1991) |
| [17] | Weinberg, S. |
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