The Effective Potential Method for Two-Dimensional SU(2)×SU(2) Lattice Sigma Model with the Fundamental-Adjoint Action

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概要

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• The effective potential method for the SU(2)×SU(2) lattice sigma model is extended to the fundamental-adjoint action. It is found that, in the intermediate temperature region, the adjoint action term greatly affects the minimum of the effective potential and leads to a first order phase transition. This is Essentially due to the F^4 term of the action, where F is the pitch of the sinusoidal spin configuration. When this term is eliminated by choosing a suitable ratio G=β_A/β, the system goes rather smoothly from the low to the high temperature region.

• 一般社団法人日本物理学会の論文
• 1983-06-25

著者

• Nokura Kazuo

  Department Of Physics Kyoto University

関連論文

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• The Effective Potential Method for Two-Dimensional SU(2)×SU(2) Lattice Sigma Model with the Fundamental-Adjoint Action

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