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Article type: Cover
2002 Volume 105 Issue 1 Pages
Cover1-
Published: April 20, 2002
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Article type: Appendix
2002 Volume 105 Issue 1 Pages
App1-
Published: April 20, 2002
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Article type: Appendix
2002 Volume 105 Issue 1 Pages
A1-A4
Published: April 20, 2002
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A5-A8
Published: April 20, 2002
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A9-A11
Published: April 20, 2002
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A12-A13
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A14-A17
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A18-A19
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A20-A24
Published: April 20, 2002
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We take into account the relaxation process of radiation weakly interacting with such material systems as gases in thermodynamic equilibrium and introduce an idea of effective absorption coefficient to be used in the equation of radiative transfer.
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A25-A28
Published: April 20, 2002
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[in Japanese], [in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A29-A31
Published: April 20, 2002
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A32-A34
Published: April 20, 2002
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A35-A37
Published: April 20, 2002
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A38-A47
Published: April 20, 2002
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A48-A49
Published: April 20, 2002
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A50-A52
Published: April 20, 2002
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Y. Liu, S. Choe, A. Nakamura, O. Miyamura, T. Takaishi
Article type: Article
2002 Volume 105 Issue 1 Pages
A53-A56
Published: April 20, 2002
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Responses of screening mass of the pseudoscalar meson and chiral condensate in lattice QCD are investigated. On a 16×8^2×4 lattice with two flavors of staggered quarks the first and second responses below and above T_C are evaluated. Different behavior in the low and the high temperature phases are presented, which may be explained as a consequence of the chiral symmetry breaking and restoration.
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[in Japanese], [in Japanese], [in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A57-A59
Published: April 20, 2002
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Tetsuya Takaishi
Article type: Article
2002 Volume 105 Issue 1 Pages
A60-A61
Published: April 20, 2002
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Hybrid Monte Cairo simulations of the pure compact U(l) gauge theory are performed with the Tsallis weight. The simulations show that the use of the Tsallis weight enhances the tunneling rate between metastable states and more reliable estimate of the order of the phase transition may be possible.
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Toshihico Arimitsu
Article type: Article
2002 Volume 105 Issue 1 Pages
A62-A72
Published: April 20, 2002
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Most of the mathematical approaches for quantum Langevin equation are based on the non-commutativity of the random force operators. Non-commutative random force operators are introduced in order to guarantee that the equal-time commutation relation for the stochastic annihilation and creation operators preserves in time. If it is true, it means that the origin of dissipation is of quantum mechanical. However, physically, it is hard to believe it. By making use of the unified canonical operator formalism for the system of the quantum stochastic differential equations within Non-Equilibrium Thermo Field Dynamics, it is shown that it is not true in general.
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Y. Yamanaka
Article type: Article
2002 Volume 105 Issue 1 Pages
A73-A82
Published: April 20, 2002
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Nonequilibrium Thermo Field Dynamics (TFD) is reviewed. The aspect that nonequilibrium TFD respects Quantum Field Theory is emphasized. A new type of renormalization condition, implying a self-consistent treatment, plays an important role. We also comment on the correspondence between TFD and the conventional density matrix formalism. The recent experiments of the Bose-Einstein condensation of neutral atoms are expected to offer a test field for thermal field theories.
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A83-A84
Published: April 20, 2002
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[in Japanese], [in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A85-A88
Published: April 20, 2002
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M. Okumura, Y. Yamanaka
Article type: Article
2002 Volume 105 Issue 1 Pages
A89-A91
Published: April 20, 2002
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We analyze the Nambu-Goldstone (NG) mode for a system of trapped Bose-Einstein condensation (BEC). The NG mode is a discrete mode in our case, contrary to the homogeneous case in which the NG mode is in a continuum labeled by a momentum index. In order to control the NG mode, an infinitesimal symmetry-breaking term is introduced. This breaking term plays the role of infinitesimal magnetic field in spin system which fixes the macroscopic "direction" of spin. We calculate a tadpole diagram to evaluate fluctuation effects, taking account of the NG mode, then find that the coefficient of the wave function of condensation is infrared divergent while the remaining terms are finite.
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A92-
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Tetsuro Nikuni
Article type: Article
2002 Volume 105 Issue 1 Pages
A93-A94
Published: April 20, 2002
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A95-A97
Published: April 20, 2002
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Kenichiro Aoki, Dimitri Kusnezov
Article type: Article
2002 Volume 105 Issue 1 Pages
A98-A104
Published: April 20, 2002
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We study the dynamics of φ^4 theory and the FPU β model under thermal gradients, from first principles. We analyze quantitatively how local equilibrium and linear response are violated, paying special care to how we find observables that unambiguously display these violations. Relations between these quantities to equations of state are also examined. Further, we discuss how we can approach similar dynamical problems in continuum quantum field theory. We analyze how close we are to obtaining the continuum results.
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Kei Iida
Article type: Article
2002 Volume 105 Issue 1 Pages
A105-A112
Published: April 20, 2002
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This talk reviews recent developments on the theory of color superconductivity. An emphasis is put on the studies concerning a high density regime, and some approaches towards a low density regime are briefly discussed.
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Article type: Article
2002 Volume 105 Issue 1 Pages
A113-A116
Published: April 20, 2002
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M. Biyajima, M. Ide, T. Mizoguchi, N. Suzuki
Article type: Article
2002 Volume 105 Issue 1 Pages
A117-A120
Published: April 20, 2002
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Recently PHOBOS Collaboration has reported the pseudorapidity distribution dN_<ch>/dη in Au-Au collisions at √<^SNN>=130 GeV. To analyse them, we have assumed that produced final hadrons are governed by the damping law [numerical formula] where y, λ and f(t) mean the rapidity, the frictional coefficient and the white noise, respectively. In the high energy collisions y≈η holds. From the damping law, we have the Fokker-Planck equation called the Ornstein-Uhlenbeck process. Assuming two sources at y_B (η_B) and y_T (η_T), we can use the solutions of the Fokker-Planck equation for analyses of dN_<ch>/dη. Our analyses show that the energy of produced hadron over the range -0.5<η<0.5 with the fluctuation due to the stochastic process, ΔE [numerical formula] in dN_<ch>/dη with the centrality cut 0-6 %. Using the Bjorken's picture for the calculation of energy density near η≈0, we have the following energy density [numerical formula].
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Article type: Article
2002 Volume 105 Issue 1 Pages
A121-A123
Published: April 20, 2002
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[in Japanese]
Article type: Article
2002 Volume 105 Issue 1 Pages
A124-A126
Published: April 20, 2002
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Yoshitaka Hatta
Article type: Article
2002 Volume 105 Issue 1 Pages
A127-A131
Published: April 20, 2002
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In the perturbation theory, trasnport phenomena in hot non-Abelian gauge theories like QCD axe often plagued with infrared singularities or nonperturbative effects. We show, in the context of the Kadanoff & Baym formalism, that there are certain nonequilibrium processes which are free from such difficulties. For these processes, due to an interplay between the macroscopic and microscopic physics, characteristic time scale (the mesoscale) naturally enters as an infrared cutoff and purely perturbative description by the Boltzmann equation is valid.
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Article type: Appendix
2002 Volume 105 Issue 1 Pages
App2-
Published: April 20, 2002
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Article type: Appendix
2002 Volume 105 Issue 1 Pages
App3-
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Article type: Cover
2002 Volume 105 Issue 1 Pages
Cover2-
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Article type: Cover
2002 Volume 105 Issue 1 Pages
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