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Article type: Cover
2009 Volume 64 Issue 6 Pages
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Published: June 05, 2009
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Article type: Index
2009 Volume 64 Issue 6 Pages
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Article type: Index
2009 Volume 64 Issue 6 Pages
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Naoto Nagaosa, Yoshinori Tokura
Article type: Article
2009 Volume 64 Issue 6 Pages
413-421
Published: June 05, 2009
Released on J-STAGE: October 30, 2020
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Magnetism and ferroelectricity are the two of the most important subjects in condensed matter physics, but their interplay has not been explored in-depth so far. Recently, many materials showing both the magnetic ordering and ferroelectricity have been discovered, and their strong coupling is studied extensively. Especially, the spin current mechanism of the ferroelectricity in the spiral magnets has been established both experimentally and theoretically. We review here the recent advances in the multiferroics from the viewpoint of "relativistic effect in solids".
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Masahiro Hoshino, Takanobu Amano
Article type: Article
2009 Volume 64 Issue 6 Pages
421-429
Published: June 05, 2009
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High energy particles of which energies exceed their rest mass energy populate the Universe. Such energetic particles (i.e., cosmic rays) are believed to be generated by shock waves, and the most popular physical model of the shock acceleration is the so-called stochastic Fermi acceleration. Yet there are many unresolved critical issues in the model. Moreover, recent observations seem to require more sophisticated particle acceleration processes. In this report, we argue the state-of-arts shock acceleration processes.
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Yutaka Hosotani
Article type: Article
2009 Volume 64 Issue 6 Pages
429-435
Published: June 05, 2009
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The Higgs particle is the only particle left to be found in the standard model of electroweak interactions, being expected to be discovered at LHC in the near future. Yet we do not clearly know what it is. In the Gauge-Higgs unification scenario the Higgs field is unified with gauge fields such as the W boson, Z boson and photon in spacetime with more than four dimensions. The Higgs field appears as an Aharonov-Bohm phase in the extra-dimensional space, whose dynamics induces spontaneous breaking of the electroweak symmetry. Its couplings to the W boson, Z boson, quarks and leptons deviate from those in the standard model, and can be tested at LHC.
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Takashi Imamura, Tomohiro Sasamoto
Article type: Article
2009 Volume 64 Issue 6 Pages
436-440
Published: June 05, 2009
Released on J-STAGE: October 30, 2020
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To understand non-equilibrium systems, many studies have been made in various approaches. In the studies on a stochastic model called asymmetric simple exclusion process (ASEP), we have been entering a new stage where we can analyze fluctuation properties for non-stationary states as well as stationary ones. We report recent progress about such topics, especially the exact solutions of the dynamics of a particular particle (tagged particle) in the ASEP.
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Shinhong Kim, Tatsuya Masubuchi
Article type: Article
2009 Volume 64 Issue 6 Pages
440-444
Published: June 05, 2009
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The CDF and Dzero experiments at Tevatron protonantiproton collider at Fermi National Accelerator Laboratory in Batavia, Illinois, USA, have recently set the upper limit of the Higgs particle mass to 185GeV/c^2 by measuring the top quark mass and the W boson mass precisely. They have also excluded the existence of the Higgs particle with a mass of 170GeV/c^2 at 95% confidence level through direct search for the Higgs particle. The Tevatron experiment will have two or three times more data of which analyses will make the allowed Higgs mass region narrower and may result in finding evidence for Higgs particle production.
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Takahiro Harada
Article type: Article
2009 Volume 64 Issue 6 Pages
445-448
Published: June 05, 2009
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In systems far from equilibrium, although it has been realized that the fluctuation-dissipation theorem is not applicable, the physical significance of its violation remains unclear. Recently, an equality directly connecting the magnitude of the violation to the rate of energy dissipation in various nonequilibrium systems has been discovered. This equality enables us to study energetic aspects of a nonequilibrium system through measurements on the fluctuations and responses. In the present article, we discuss the physical significance of this new relation as well as its possibility of experimental application.
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Shingo Ichimura, Masahiro Seto
Article type: Article
2009 Volume 64 Issue 6 Pages
449-451
Published: June 05, 2009
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Hajime Takayama
Article type: Article
2009 Volume 64 Issue 6 Pages
452-455
Published: June 05, 2009
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Ichiro Shibasaki
Article type: Article
2009 Volume 64 Issue 6 Pages
456-460
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Maika Nakao
Article type: Article
2009 Volume 64 Issue 6 Pages
461-462
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Takashi Odagaki
Article type: Article
2009 Volume 64 Issue 6 Pages
463-
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Akira Ukawa
Article type: Article
2009 Volume 64 Issue 6 Pages
464-
Published: June 05, 2009
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[in Japanese]
Article type: Article
2009 Volume 64 Issue 6 Pages
465-
Published: June 05, 2009
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[in Japanese]
Article type: Article
2009 Volume 64 Issue 6 Pages
465-466
Published: June 05, 2009
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[in Japanese]
Article type: Article
2009 Volume 64 Issue 6 Pages
466-
Published: June 05, 2009
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[in Japanese]
Article type: Article
2009 Volume 64 Issue 6 Pages
466-467
Published: June 05, 2009
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[in Japanese]
Article type: Article
2009 Volume 64 Issue 6 Pages
468-
Published: June 05, 2009
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[in Japanese]
Article type: Article
2009 Volume 64 Issue 6 Pages
469-
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Article type: Appendix
2009 Volume 64 Issue 6 Pages
470-477
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Article type: Appendix
2009 Volume 64 Issue 6 Pages
478-
Published: June 05, 2009
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[in Japanese]
Article type: Appendix
2009 Volume 64 Issue 6 Pages
479-
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Article type: Appendix
2009 Volume 64 Issue 6 Pages
480-484
Published: June 05, 2009
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Article type: Appendix
2009 Volume 64 Issue 6 Pages
486-516
Published: June 05, 2009
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Article type: Appendix
2009 Volume 64 Issue 6 Pages
517-518
Published: June 05, 2009
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