Dynamics of the Ising Chain with Four-Spin Interactions in a Disordered Transverse Magnetic Field : Condensed Matter: Electronic Properties, etc.
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概要
- 論文の詳細を見る
We study the time dependent behavior of the four-spin interactions Ising chain in the presence of a disordered transverse magnetic field. In order to analyze the effects of field randomness in the dynamical behavior of the system we calculate the time-dependent correlation function and the longitudinal relaxation function of the infinite chain. We consider a bi-modal distribution for the field energy strength, where one of its values equals the exchange coupling energy while the other value can be lower or higher than the coupling energy. We find that an in-creasing concentration of weaker fields produces an enhancement of the central mode behavior. However, when the concentration of stronger fields increases, the system undergoes a crossover from central mode to collective-type dynamics.
- 社団法人日本物理学会の論文
- 2001-03-15
著者
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Cordeiro Claudette
Instituto De Fisica Universidade Federal Fluminense
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Sa Barreto
Departamento De Fesica-icex Universidade Federal De Minas Gerais
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Boechat Beatriz
Instituto De Fisica Universidade Federal Fluminense
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DE ALCANTARA
Department of Physics, Reed College
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FLORENCIO Joao
Departamento de Fesica-ICEX, Universidade Federal de Minas Gerais
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De Alcantara
Department Of Physics Reed College
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Florencio Joao
Departamento De Fesica-icex Universidade Federal De Minas Gerais
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DE ALCANTARA
Department of Pathology, University of Brasilia
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Corderio Claudette
Instituto de Fisica, Universidade Federal Fluminense
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