Anisotropy dissipation in the early Universe: Finite-temperature effects reexamined
We reexamine the role that finite-temperature effects play in the dissipation of the initial anisotropy of the Universe. The issue was previously studied both in the zero- and finite-temperature cases. Our results show that the finite-temperature corrections do not introduce new qualitative behavior...
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1990
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v41_n4_p1054_Paz http://hdl.handle.net/20.500.12110/paper_05562821_v41_n4_p1054_Paz |
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paper:paper_05562821_v41_n4_p1054_Paz2023-06-08T15:42:08Z Anisotropy dissipation in the early Universe: Finite-temperature effects reexamined We reexamine the role that finite-temperature effects play in the dissipation of the initial anisotropy of the Universe. The issue was previously studied both in the zero- and finite-temperature cases. Our results show that the finite-temperature corrections do not introduce new qualitative behavior and that the anisotropy dissipation scenario is approximately the same as in the zero-temperature case. We use a formalism that is based on the extension to finite temperature of the closed-time-path method (it can be used to study systems out of thermal equilibrium). The effective equations that we obtain are real and causal. We compare our results with others obtained in the zero- and finite-temperature cases. We discuss some qualitative differences between the formalisms that are more frequently used to study real-time processes at finite temperature. © 1990 The American Physical Society. 1990 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v41_n4_p1054_Paz http://hdl.handle.net/20.500.12110/paper_05562821_v41_n4_p1054_Paz |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| description |
We reexamine the role that finite-temperature effects play in the dissipation of the initial anisotropy of the Universe. The issue was previously studied both in the zero- and finite-temperature cases. Our results show that the finite-temperature corrections do not introduce new qualitative behavior and that the anisotropy dissipation scenario is approximately the same as in the zero-temperature case. We use a formalism that is based on the extension to finite temperature of the closed-time-path method (it can be used to study systems out of thermal equilibrium). The effective equations that we obtain are real and causal. We compare our results with others obtained in the zero- and finite-temperature cases. We discuss some qualitative differences between the formalisms that are more frequently used to study real-time processes at finite temperature. © 1990 The American Physical Society. |
| title |
Anisotropy dissipation in the early Universe: Finite-temperature effects reexamined |
| spellingShingle |
Anisotropy dissipation in the early Universe: Finite-temperature effects reexamined |
| title_short |
Anisotropy dissipation in the early Universe: Finite-temperature effects reexamined |
| title_full |
Anisotropy dissipation in the early Universe: Finite-temperature effects reexamined |
| title_fullStr |
Anisotropy dissipation in the early Universe: Finite-temperature effects reexamined |
| title_full_unstemmed |
Anisotropy dissipation in the early Universe: Finite-temperature effects reexamined |
| title_sort |
anisotropy dissipation in the early universe: finite-temperature effects reexamined |
| publishDate |
1990 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562821_v41_n4_p1054_Paz http://hdl.handle.net/20.500.12110/paper_05562821_v41_n4_p1054_Paz |
| _version_ |
1768543565917454336 |