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Doctoral Thesis
DOI
https://doi.org/10.11606/T.43.2006.tde-11042007-140207
Document
Author
Full name
Carlos Eduardo Fiore dos Santos
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2006
Supervisor
Committee
Oliveira, Mario Jose de (President)
Fontanari, Jose Fernando
Plascak, Joao Antonio
Prado, Carmen Pimentel Cintra do
Stilck, Jürgen Fritz
Title in Portuguese
"Sistemas fora do equilíbrio termodinâmico: Um estudo em diferentes abordagens"
Keywords in Portuguese
Equivalência de ensembles
Mecânica estatística
Simulações numéricas
Sistemas fora de equilibrio
Abstract in Portuguese
Nesta tese de doutorado apresentamos um estudo sobre o comportamento de diversos sistemas irrevers?veis, caracterizados pela existencia de estados absorventes, atraves de abordagens distintas. Utilizamos aproximacoes de campo medio dinamico, simulacoes numericas usuais, mudanca de ensemble e expanso em serie. Alem disso, mostramos numa parte deste trabalho que a abordagem proposta para o estudo de sistemas irrevers?veis no ensemble em que o numero de part?culas e constante tambem pode ser estendida para sistemas em equil´?brio termodinamico, descrito pela distribuicao de probabilidades de Gibbs. Finalmente mostramos problemas em aberto para trabalhos futuros.
Title in English
Nonequilibrium systems: an study by means of different approaches
Keywords in English
Equivalence of ensembles
Nonequilibrium systems
Numerical simulations
Statistical mechanics
Abstract in English
In this PHD thesis, we have presented a study about several nonequilibrium systems with absorbing states by means of different approaches, such as mean-field analysis, usual numerical simulations, analysis in another ensemble and perturbative series expansions. In a specific part of this thesis, we have shown that the approach proposed here for describing nonequilibrium systems in the constant particle number ensemble can also be used to caracterize equilibrium systems, described by Gibbs probability distribution. Finally, we have shown open problems for future researchs.
 
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1556314.pdf (3.30 Mbytes)
Publishing Date
2007-06-11
 
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