Artículo
Abstract:
In the semiclassical limit of quantum gravity, solutions to the Wheeler-DeWitt equation involve several WKB components. In order to reach the adequate classical limit these contributions should not interfere. We show here that this is in general the case. We work with a general minisuper-space model with perturbations and we construct the reduced density matrix I(gA, gA) by tracing out all the nonrelevant modes of the environment. It turns out that not only are the off-diagonal terms of I (gA, gA) strongly suppressed but the quantum contributions to I(gA, gA) due to interference between different semiclassical solutions also vanish. As an example we discuss the particular case of the Kantowski-Sachs cosmological model. © 1991 The American Physical Society.
Registro:
| Documento: | Artículo |
| Título: | Loss of coherence in multidimensional minisuperspaces |
| Autor: | Gangui, A.; Mazzitelli, F.D.; Castagnino, M.A. |
| Filiación: | Instituto de Astronomía y Física Del Espacio, Casilla de Correo 67, Sucursal 28, 1428 Buenos Aires, Argentina Departamento de Física, Facultad de Ciencias Exactas y Naturales, Pabellan i, 1428 Buenos Aires, Argentina International Centre for Theoretical Physics, P. O. Box 586, 34100 Trieste, Italy |
| Año: | 1991 |
| Volumen: | 43 |
| Número: | 6 |
| Página de inicio: | 1853 |
| Página de fin: | 1858 |
| DOI: | http://dx.doi.org/10.1103/PhysRevD.43.1853 |
| Título revista: | Physical Review D |
| ISSN: | 05562821 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v43_n6_p1853_Gangui |
Referencias:
- Halliwell, J.J., (1989) Phys. Rev. D, 39, p. 2912
- Zurek, W.H., (1981) Phys. Rev. D, 24, p. 1516
- Zurek, W.H., (1982) Phys. Rev. D, 26, p. 1862
- Joos, E., Zeh, H.D., (1985) Z. Phys. B, 59, p. 223
- Kiefer, C., (1987) Class. Quantum Grav., 4, p. 1369
- Padmanabhan, T., (1989) Phys. Rev. D, 39, p. 2924
- Halliwell, J.J., (1987) Phys. Rev. D, 36, p. 3626
- Calzetta, E., Mazzitelli, F.D., (1990) Phys. Rev. D, 42, p. 4066
- Hartle, J.B., Hawking, S.W., (1983) Phys. Rev. D, 28, p. 2960
- Vilenkin, A., (1988) Phys. Rev. D, 37, p. 888
- Birrell, N.D., Davies, P.C.W., (1982) Quantum Fields in Curved Spacetime, , Cambridge University Press, Cambridge, England
- Kantowski, R., Sachs, R., (1966) J. Math. Phys., 7, p. 443
- Louko, J., (1987) Phys. Rev. D, 35, p. 3760
- Louko, J., Vachaspati, T., (1989) Phys. Lett. B, 223, p. 21
Citas:
---------- APA ----------
Gangui, A., Mazzitelli, F.D. & Castagnino, M.A. (1991) . Loss of coherence in multidimensional minisuperspaces. Physical Review D, 43(6), 1853-1858.http://dx.doi.org/10.1103/PhysRevD.43.1853
---------- CHICAGO ----------
Gangui, A., Mazzitelli, F.D., Castagnino, M.A. "Loss of coherence in multidimensional minisuperspaces" . Physical Review D 43, no. 6 (1991) : 1853-1858.http://dx.doi.org/10.1103/PhysRevD.43.1853
---------- MLA ----------
Gangui, A., Mazzitelli, F.D., Castagnino, M.A. "Loss of coherence in multidimensional minisuperspaces" . Physical Review D, vol. 43, no. 6, 1991, pp. 1853-1858.http://dx.doi.org/10.1103/PhysRevD.43.1853
---------- VANCOUVER ----------
Gangui, A., Mazzitelli, F.D., Castagnino, M.A. Loss of coherence in multidimensional minisuperspaces. 1991;43(6):1853-1858.http://dx.doi.org/10.1103/PhysRevD.43.1853
