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Abstract:

We study the issue of decoherence and dissipation in the wave function of the Universe for a Bianchi type-I universe with classical and quantum matter. We obtain a coarse-grained description by tracing over the matter degrees of freedom. Provided that for small universes the wave function of the universe is concentrated on a neighborhood of the isotropic configuration, then the coarse-grained density matrix of the universe will show an even more marked peak around isotropy for large universes. In this sense we can say that, while decoherence makes the reduced density matrix of the universe diagonal, dissipation causes the universe to be isotropic with a high probability for large radii. © 1991 The American Physical Society.

Registro:

Documento: Artículo
Título:Anisotropy dissipation in quantum cosmology
Autor:Calzetta, E.
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
Año:1991
Volumen:43
Número:8
Página de inicio:2498
Página de fin:2509
DOI: http://dx.doi.org/10.1103/PhysRevD.43.2498
Título revista:Physical Review D
ISSN:05562821
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v43_n8_p2498_Calzetta

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Citas:

---------- APA ----------
(1991) . Anisotropy dissipation in quantum cosmology. Physical Review D, 43(8), 2498-2509.
http://dx.doi.org/10.1103/PhysRevD.43.2498
---------- CHICAGO ----------
Calzetta, E. "Anisotropy dissipation in quantum cosmology" . Physical Review D 43, no. 8 (1991) : 2498-2509.
http://dx.doi.org/10.1103/PhysRevD.43.2498
---------- MLA ----------
Calzetta, E. "Anisotropy dissipation in quantum cosmology" . Physical Review D, vol. 43, no. 8, 1991, pp. 2498-2509.
http://dx.doi.org/10.1103/PhysRevD.43.2498
---------- VANCOUVER ----------
Calzetta, E. Anisotropy dissipation in quantum cosmology. 1991;43(8):2498-2509.
http://dx.doi.org/10.1103/PhysRevD.43.2498