Dynamical Mean Field Theory of Spin Glasses and Their Phase Transitions in ac External Fields

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概要

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• The dynamical mean field theory of spin glasses is investigated in systems with non-zero mean of the infinitely-ranged random exchange interactions under uniform but alternating external magnetic fields. A perturbational expansion with respect to the interaction uσ^4_i introduced in a soft-spin version of the model is analyzed by means of the diagrammatic method. Restricting ourselves to its lowest order (single-loop) approximation, we examine relaxational dynamics of the model spin glass and clarify nature of its phase transition in the presence of an ac external field. The results provide a new clue to ac nonlinear measurements on spin glasses.

• 理論物理学刊行会の論文
• 1987-01-20

著者

• Takayama H

  Univ. Tokyo Kashiwa Jpn

• Shirakura T

  Faculty Of Humanities And Social Sciences Iwate University

• Shirakura Takayuki

  Department of Applied Physics, Tohoku University

• TAKAYAMA Hajime

  Research Institute for Fundamental Physics, Kyoto University

• NEMOTO Koji

  Department of Physics, Hokkaido University

• Nemoto Koji

  Department Of Physics Hokkaido University

• Shirakura Takayuki

  Department Of Applied Physics Tohoku University

• Nemoto Koji

  Department Of Environmental Studies Graduate School Of Environmental Studies Tohoku University

• Takayama Hajime

  Research Institute For Fundamental Physics Kyoto University

• Takayama Hajime

  Research Institute For Fundamental Phisics Kyoto University

• Nemoto Koji

  Department Of Biomolecular Engineering Graduate School Of Engineering Tohoku University

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