Actas de congresos
Conformal Quantum Effects And The Anisotropic Singularities Of Scalar-tensor Theories Of Gravity
Registro en:
International Journal Of Theoretical Physics. , v. 43, n. 3, p. 575 - 583, 2004.
207748
10.1023/B:IJTP.0000048165.51958.9a
2-s2.0-24144435910
Autor
Gunzig E.
Saa A.
Institución
Resumen
We show that the inclusion of a term CabcdCabcd in the action can remove the recently described anisotropic singularity occurring on the hypersurface F (φ) = 0 of scalar-tensor theories of gravity of the type S = ∫ d4x√-g{F(φ)R - ∂aφ∂ aφ - 2V(φ)} preserving, by construction, all of their isotropic solutions. We show that, in principle, a higher order term of this type can arise from considerations about the renormalizability of the semiclassical approach to the theory. Such result brings again into consideration the quintessential models recently proposed based in a conformally coupled scalar field (F(φ2) = 1 - 1/6φ 2) with potential V(φ) = m/2φ2 - Ω/4φ4, that have been discharged as unrealistic precisely by their anisotropic instabilities on the hypersurface F (φ) = 0. © 2004 Springer Science+Business Media, Inc. 43 3 575 583 Abramo, L.R., Brenig, L., Gunzig, E., Saa, A., (2003) Physical Review, D67, p. 027301 Abramo, L.R., Brenig, L., Gunzig, E., Saa, A., (2003) International Journal of Theoretical Physics, 42, p. 1145 Bertolami, O., (1987) Physics Letters, 186 B, p. 161 Birrel, N.D., Davies, P.C.W., (1982) Quantum Fields in Curved Spaces, , Cambridge University Press, Cambridge, UK Buchbinder, I.L., Odintsov, S.D., Shapiro, I.L., (1992) Effective Action in Quantum Gravity, , IOP, Bristol, UK Chimento, L.P., (2003) Physical Review, D68, p. 023504 Deser, S., (1984) Physics Letters, 134 B, p. 419 Esposito-Farese, G., Polarski, D., (2001) Physical Review, D63, p. 063504 Fischetti, M.V., Hartle, J.B., Hu, B.L., (1979) Physical Review, D20, p. 1757 Futamase, T., Maeda, K., (1989) Physical Review, D39, p. 399 Futamase, T., Rothman, T., Matzner, R., (1981) Physical Review, D39, p. 405 Gunzig, E., Saa, A., manuscript in preparationGunzig, E., Saa, A., Brenig, L., Faraoni, V., Filho, T.M.R., Figueiredo, A., (2001) Physical Review, D63, p. 067301 Gunzig, E., Saa, A., Brenig, L., Faraoni, V., Filho, T.M.R., Figueiredo, A., (2001) International Journal of Theoretical Physics, 40, p. 2295 Hartle, J.B., Hu, B.L., (1979) Physical Review, D20, p. 1772 Hartle, J.B., Hu, B.L., (1980) Physical Review, D21, p. 2756 Hosotani, Y., (1985) Physical Review, D32, p. 1949 Hu, B.L., Parker, L., (1978) Physical Review, D17, p. 933 Hu, B.L., Parker, L., (1978) Physical Review, D17, p. 3292 Parker, L., (1968) Physical Review Letters, 21, p. 562 Parker, L., (1969) Physical Review, 183, p. 1057 Parker, L., (1971) Physical Review, D3, p. 346 Parker, L., Raval, A., (1999) Physical Review, D60, p. 063512 Parker, L., Raval, A., (1999) Physical Review, D60, p. 123502 Parker, L., Raval, A., (2000) Physical Review, D62, p. 083503 Parker, L., Raval, A., (2001) Physical Review Letters, 86, p. 749 Parker, L., Raval, A., (2003) Physical Review, D67, p. 029901 Parker, L., Raval, A., (2003) Physical Review, D67, p. 029902 Parker, L., Raval, A., (2003) Physical Review, D67, p. 029903 Parker, L., Vanzella, D.A.T., (2003) Acceleration of the Universe, Vacuum Metamorphosis, and the Large-time Asymptotic Form of the Heat Kernel, , gr-qc/0312108 Saa, A., Manuscript in preparationShapiro, I.L., Sola, J., (2002) JHEP, 202, p. 006 Shapiro, I.L., Sola, J., Espana-Bonet, C., Ruiz-Lapuente, P., (2003) Physics Letters, 574 B, p. 149 Starobinski, A.A., (1981) Pis'ma v Astronomicheskii, 7, p. 67 Soviet Astronomy Letters, 7, p. 36 Zeldovich, Ya.B., (1967) Soviet Physics JETP Letters, 6, p. 883