Use este identificador para citar ou linkar para este item:
https://locus.ufv.br//handle/123456789/19177
Tipo: | Artigo |
Título: | Dynamics of the transverse Ising model with next-nearest-neighbor interactions |
Autor(es): | Guimarães, P. R. C. Plascak, J. A. Bonfim, O. F. de Alcantara Florencio, J. |
Abstract: | We study the effects of next-nearest-neighbor (NNN) interactions on the dynamics of the one-dimensional spin-1/2 transverse Ising model in the high-temperature limit. We use exact diagonalization to obtain the time-dependent transverse correlation function and the corresponding spectral density for a tagged spin. Our results for chains of 13 spins with periodic boundary conditions produce results which are valid in the infinite-size limit. In general we find that the NNN coupling produces slower dynamics accompanied by an enhancement of the central mode behavior. Even in the case of a strong transverse field, if the NNN coupling is sufficiently large, then there is a crossover from collective mode to central mode behavior. We also obtain several recurrants for the continued fraction representation of the relaxation function. |
Palavras-chave: | Next-nearest-neighbor Transverse Ising model |
Editor: | Physical Review E |
Tipo de Acesso: | American Physical Society |
URI: | https://doi.org/10.1103/PhysRevE.92.042115 http://www.locus.ufv.br/handle/123456789/19177 |
Data do documento: | 7-Out-2015 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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artigo.pdf Until 2100-12-31 | Texto completo | 1,01 MB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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