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Título:
Nami Svaiter (CBPF): A disordered Landau-Ginzburg model
quando:
12.07.2018 11.00 h
onde:
Sala 429 (torre nova) - Niterói
Categoria:
Seminários

Descrição

Seminário de Matéria Condensada

 

 
12/07 - 5a feira - 11h00
Sala 429 - 4o andar da torre nova
 
Palestrante: Nami Svaiter (CBPF)
 
Titulo: A disordered  Landau-Ginzburg model
 
Resumo:
        We discuss a disordered  Landau-Ginzburg model defined in a d-dimensional space. First we adopt the standard procedure of averaging the disorder dependent free energy of the model. The dominant contribution to this quantity is represented by a series of the replica partition functions of the system. Next, using the replica symmetry ansatz in the saddle-point equations, we prove that the average free energy represents a system with multiple ground states with different order parameters. For low temperatures we show the presence of metastable equilibrium states for some replica fields for a range of values of the physical parameters. Finally, going beyond the mean-field approximation,  the one-loop renormalization of this model is performed, in the leading order replica partition function.

Grupo

Mapa
Grupo:
Sala 429 (torre nova)
Rua:
Av. Gal. Milton Tavares de Sousa s/n
CEP:
2421-346
Cidade:
Niterói
UF:
RJ
País:
País: br

Descrição

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