Gross Neveu Model
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. The 2d gross-neveu model at finite temperature and density with finite N corrections
We use the linear delta expansion, or optimized perturbation theory, to evaluate the effective potential for the two dimensional Gross-Neveu model at finite temperature and density obtaining analytical equations for the critical temperature, chemical potential and fermionic mass which include finite N corrections. Our results seem to improve over the traditi
Brazilian Journal of Physics. Publicado em: 2007-03
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2. Confinement in the 3-dimensional Gross-Neveu model at finite temperature
We study the N-component (2+1)-dimensional Gross-Neveu model bounded between two parallel planes separated by a distance L at finite temperature (T). We obtain a closed expression for the large-N effective coupling constant g = g(L,T,lambda). Different behavior depending on the magnitude of the fixed coupling constant lambda is found to lead to a ''critical'
Brazilian Journal of Physics. Publicado em: 2007-03
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3. Thermal behavior of the compactified 3-D gross-neveu model
We consider the N-component tri-dimensional massive Gross-Neveu model at finite temperature and with compactified spatial coordinates. We study the behavior of the renormalized large-N effective coupling constant, investigating its dependence on the compactification length and the temperature. We show that spatial confinement exists for the model at T = 0, w
Brazilian Journal of Physics. Publicado em: 2006-12
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4. Tratamento Cinético de um sistema de muitos corpos descritos pelo modelo fermiônico quiral de Gross-Neveu. / Kinetic treatment of a many-body system described by the fermionic chiral Gross-Neveu model.
Uma técnica de projeção é usada para tratar o problema de condição inicial na teoria quântica de campos. Neste formalismo, equações de movimento do tipo cinético são deduzidas para o conjunto de variáveis dinâmicas de um corpo. Estas equações são submetidas a uma expansão não perturbativa. Tratamos esta expansão em ordem mais baixa, corres
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/04/1995
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5. Quantização de solitons no modelo de Gross-Neveu
Using the order-disorder formalism we obtain the explicit form or the soliton operator of the Gross-Neveu model and we calculate, in a particuar aproximation, the two point correlation function of these operators. From the asymptotic behaviour of this function we obtain the soliton mass. As a by-product we calculate the fermionic determinant. ( i¶ - m + aA
Publicado em: 1990