Equation of State of Structured Matter at Finite Temperature(Nuclear Astrophysics,New Frontiers in QCD 2010-Exotic Hadron Systems and Dense Matter-)
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概要
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We investigate the properties of nuclear matter at the first-order phase transitions such as liquid-gas phase transition and hadron-quark phase transition. As a general feature of the first-order phase transitions of matter consisting of many species of charged particles, there appears a mixed phases with geometrical structures called "pasta" due to the balance of the Coulomb repulsion and the surface tension between two phases [G. D. Ravenhall, C. J. Pethick and J. R. Wilson, Phys. Rev. Lett. 50 (1983), 2066. M. Hashimoto, H. Seki and M. Yamada, Prog. Theor. Phys. 71 (1984), 320.] The equation of state (EOS) of mixed phase is different from the one obtained by a bulk application of the Gibbs conditions or by the Maxwell construction due to the effects of the non-uniform structure. We show that the charge screening and strong surface tension make the EOS close to that of the Maxwell construction. The thermal effects are elucidated as well as the above finite-size effects.
- 2010-12-17
著者
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Maruyama Toshiki
Advanced Science Research Center Japan Atomic Energy Agency
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Tatsumi Toshitaka
Department Of Physics Kyoto University
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YASUTAKE Nobutoshi
Department of Physics, Kyushu University
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Yasutake Nobutoshi
Division Of Theoretical Astronomy National Astronomical Observatory Of Japan
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