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Abstract:

Following the idea that the global and local arrow of time has a cosmological origin, we define an entropy in the classical and in the quantum periods of the universe evolution. For the quantum period a semi-classical approach is adopted, modelling the universe with Wheeler-De Witt equation and using WKB. By applying the self-induced decoherence to the state of the universe it is proved that the quantum universe becomes a classical one. This allows us to define a conditional entropy which, in our simplified model, is proportional to e2γt where γ is the dumping factor associated with the interaction potential of the scalar fields. Finally we find both Gibbs and thermodynamical entropy of the universe based in the conditional entropy. © Springer Science+Business Media, LLC 2009.

Registro:

Documento: Artículo
Título:Growing classical and quantum entropies in the early universe
Autor:Ardenghi, J.S.; Castagnino, M.A.
Filiación:Institute of Astronomy and Physics of Space, Casilla de Correo 67, Sucursal 28, 1428 Buenos Aires, Argentina
Institutes of Physics of Rosario and Astronomy and Physics of Space, Casilla de Correo 67, Sucursal 28, 1428 Buenos Aires, Argentina
Palabras clave:Decoherence; Entropy; Quantum universe
Año:2010
Volumen:49
Número:1
Página de inicio:171
Página de fin:186
DOI: http://dx.doi.org/10.1007/s10773-009-0190-z
Título revista:International Journal of Theoretical Physics
Título revista abreviado:Int. J. Theor. Phys.
ISSN:00207748
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00207748_v49_n1_p171_Ardenghi

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Citas:

---------- APA ----------
Ardenghi, J.S. & Castagnino, M.A. (2010) . Growing classical and quantum entropies in the early universe. International Journal of Theoretical Physics, 49(1), 171-186.
http://dx.doi.org/10.1007/s10773-009-0190-z
---------- CHICAGO ----------
Ardenghi, J.S., Castagnino, M.A. "Growing classical and quantum entropies in the early universe" . International Journal of Theoretical Physics 49, no. 1 (2010) : 171-186.
http://dx.doi.org/10.1007/s10773-009-0190-z
---------- MLA ----------
Ardenghi, J.S., Castagnino, M.A. "Growing classical and quantum entropies in the early universe" . International Journal of Theoretical Physics, vol. 49, no. 1, 2010, pp. 171-186.
http://dx.doi.org/10.1007/s10773-009-0190-z
---------- VANCOUVER ----------
Ardenghi, J.S., Castagnino, M.A. Growing classical and quantum entropies in the early universe. Int. J. Theor. Phys. 2010;49(1):171-186.
http://dx.doi.org/10.1007/s10773-009-0190-z