Phase Transitions and the Perfectness of Fluids(RHIC Phenomenology/Theory,New Frontiers in QCD 2008-Fundamental Problems in Hot and/or Dense Matter-)

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概要

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• We calculate the ratio η/s, the shear viscosity (η) to entropy density (s), which characterizes how perfect a fluid is, in weakly coupled real scalar field theories with different types of phase transitions. The resulting η/s behaviors agree with the empirical observations in atomic and molecular systems such as H_2O, He and N. These behaviors are expected to be the same in N component scalar theories with an O (N) symmetry. We speculate these η/s behaviors are general properties of fluid shared by QCD and cold atoms. Finally, we clarify some issues regarding counterexamples of the conjectured universal bound η/s≥1/4π found in [T. D. Cohen, Phys. Rev. Lett. 99 (2007), 021602; hep-th/0702136. A. Cherman, T. D. Cohen and P. M. Hohler, arXiv: 0708.4201. A. Dobado and F. J. Llanes-Estrada, Eur. Phys. J. C 51 (2007), 913; hep-th/0703132].

• 2008-10-15

著者

• Chen Jiunn-wei

  Department Of Physics And Center For Theoretical Sciences National Taiwan University

• CHEN Jiunn-Wei

  Department of Physics and Center for Theoretical Sciences, National Taiwan University

関連論文

• Phase Transitions and the Perfectness of Fluids(RHIC Phenomenology/Theory,New Frontiers in QCD 2008-Fundamental Problems in Hot and/or Dense Matter-)

スポンサーリンク