Nonequilibrium chiral dynamics by the time dependent variational approach with squeezed states(Non-equilibrium Dynamics in the QCD Phase Transitions)

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概要

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• We study the dynamics of chiral phase transition in the O(4) linear sigma model using the time-dependent variational approach with squeezed states. We show that large domains of the disoriented chiral condensate (DCC) are formed due to the combined effect of the mode-mode and the isospin-isospin correlations. Moreover, it is found that, when the mode-mode correlation is included, the DCC domain formation is accompanied by the amplification of the quantum fluctuation, which implies the squeezing of the state. Since this effect cannot be included in the mean field approximation, this mechanism of DCC domain formation is different from the parametric amplification. We also present a result of an analysis of the two-particle correlation function for the pion fields, which reflects unique nature of the squeezed states.

• 素粒子論グループ 素粒子研究編集部の論文
• 2005-10-20

著者

• Asakawa M.

  Department of Physics, Osaka University

• Ikezi N.

  Research Center For Nuclear Physics Osaka University:department Of Physics Osaka University

• Tsue Y.

  Physics Division, Faculty of Science, Kochi University

• Tsue Y.

  Physics Division Faculty Of Science Kochi University

• Asakawa M.

  Department Of Physics Osaka University

• 池知 直子

  Research Center for Nuclear Physics, Osaka University

関連論文

• Hydrodynamic expansion with the QCD critical point (基研研究会 熱場の量子論とその応用)
• Spectral Functions of Hadrons in Lattice QCD (熱湯の量子論とその応用)
• Nonequilibrium chiral dynamics by the time dependent variational approach with squeezed states(Non-equilibrium Dynamics in the QCD Phase Transitions)

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