Roberge-Weiss相転移と拡張されたZ_3対称性(熱場の量子論とその応用,研究会報告)
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概要
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Using the Polyakov extended Nambu-Jona-Lasinio (PNJL) model with imaginary chemical potential, the relation between the Roberge-Weiss (RW) phase transition and the extended Z_3 symmetry is studied. At low temperature, there is approximate continuous symmetry under the phase transformation of the Polyakov loop with the shift of the imaginary chemical potential. Due to this continuous symmetry, the Polyakov loop can oscillate smoothly as the imaginary chemical potential increases. At high temperature, this continuous symmetry is broken to an exact discrete symmetry, the extended Z_3 symmetry, and the Polyakov loop can not oscillate smoothly. This symmetry breaking of the continuous symmetry causes a discontinuity of the Polyakov loop. That is the RW phase transition.
- 素粒子論グループ 素粒子論研究編集部の論文
- 2009-02-20
著者
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河野 宏明
佐賀大学
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Kashiwa K.
Department of Physics, Kyushu University
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Yahiro M.
Department of Physics, Kyushu University
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Matsuzaki M.
Department of Physics, Kyushu University
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Sakai Y.
Department of Physics, Kyushu University
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Matsuzaki M.
Department Of Medical Bioregulation Yamaguchi University School Of Medicine
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Yahiro M.
Department Of Physics And Earth Sciences University Of Ryukyus
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Kashiwa K.
Department Of Physics Kyushu University
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Sakai Y.
Department of Electronics, Tokyo Institute of Technology
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