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Article type: Cover
2015 Volume 70 Issue 6 Pages
Cover1-
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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Hiroyoshi Sakurai
Article type: Article
2015 Volume 70 Issue 6 Pages
403-
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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Article type: Index
2015 Volume 70 Issue 6 Pages
404-405
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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Shigemi Mizukami
Article type: Article
2015 Volume 70 Issue 6 Pages
406-407
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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Shinya Kanemura
Article type: Article
2015 Volume 70 Issue 6 Pages
408-418
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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We discuss that the Higgs boson discovery in 2012 is an important step to explore new physics beyond the standard model for particles physics. After the short review of the standard Higgs sector, we discuss the relation between Higgs physics and the new physics models for the hierarchy problem, baryon asymmetry of the universe, dark matter and tiny neutrino masses. We then explain that the Higgs physics is a good probe of new physics beyond the standard model.
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Tetsuo Deguchi, Jun Sato, Eriko Kaminishi
Article type: Article
2015 Volume 70 Issue 6 Pages
419-426
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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Exact dynamics of isolated quantum integrable systems such as quantum quench has attracted much interest recently. Relaxation of isolated quantum systems is explained in terms of typicality, which is a key fundamental concept in quantum statistical mechanics. We review exact relaxation dynamics of the one-dimensional (1D) Bose gas by showing the time evolution of the density profile of an initially dipped quantum state. We also review the derivation of the fundamental inequality of typicality and the Bethe-ansatz solution of the 1D Bose gas interacting through the delta-function potentials, in particular, the determinant formula for the form factor of the local density operator in the 1D Bose gas.
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Nobuhiro Maekawa
Article type: Article
2015 Volume 70 Issue 6 Pages
427-435
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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Grand unified theory (GUT) unifies not only three forces (electromagnetic force, strong force and weak force) but also quarks and leptons. As an experimental support for the unification of forces, it is well-known that three gauge couplings meet at a scale (the GUT scale). However, it is not so well-known that there is an experimental support even for the unification of matters (quarks and leptons). We explain the indirect support in this document and show that the important key is what the neutrino experiments have revealed for 20 years. Concretely, for the unification of matters in SU(5) GUT, various observed hierarchies of quark and lepton masses and mixings can be understood only from one assumption that "10 dimensional fields of SU(5) induce stronger hierarchy for the Yukawa couplings than 5^^- fields". For this explanation, the knowledges on neutrino masses and mixings are critical. In the end, we comment E_6, unification in which the above assumption in the SU(5) GUT can be induced.
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Goro Ishiki, Jun Nishimura, Masanori Hanada, Yoshifumi Hyakutake
Article type: Article
2015 Volume 70 Issue 6 Pages
436-440
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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Einstein's general relativity is a classical theory of gravity, and hence it cannot be applied to the interior of a black hole due to the existence of a singularity. Based on the description of solitonic objects in superstring theory, which is a consistent theory of quantum gravity, Maldacena conjectured that the interior structure of a black hole can be described by a gauge theory in lower dimensions. This description may be regarded as a manifestation of the holographic principle. Here we test this conjecture by calculating the mass of a black hole in the corresponding gauge theory numerically. Our results agree well with the prediction from gravity theory including the leading quantum gravity correction.
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Jun Fujioka, Kentaro Ueda, Yoshinori Tokura
Article type: Article
2015 Volume 70 Issue 6 Pages
441-445
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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We report on the variation of bulk electronic state and charge transport property upon the metal-insulator transition in the pyrochlore-type iridate R_2Ir_2O_7, which is a correlated electron system with the strong spin-orbit coupling. We have identified a metallic bound state emerging at the magnetic domain wall in Mott insulating phase on the verge of Mott transition. Interestingly, the charge gap of bulk is nearly zero on the verge of Mott transition. The results can be interpreted in terms of the emergence of Weyl semimetallic state in-between the Mott insulating phase and metallic phase in this class of correlated electron system with strong spin-orbit coupling.
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 6 Pages
446-449
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 6 Pages
450-453
Published: June 05, 2015
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 6 Pages
454-455
Published: June 05, 2015
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 6 Pages
456-457
Published: June 05, 2015
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[in Japanese], [in Japanese]
Article type: Article
2015 Volume 70 Issue 6 Pages
458-
Published: June 05, 2015
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 6 Pages
459-
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 6 Pages
460-
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 6 Pages
461-
Published: June 05, 2015
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Article type: Appendix
2015 Volume 70 Issue 6 Pages
462-465
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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Article type: Appendix
2015 Volume 70 Issue 6 Pages
465-466
Published: June 05, 2015
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[in Japanese]
2015 Volume 70 Issue 6 Pages
467-
Published: June 05, 2015
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2015 Volume 70 Issue 6 Pages
468-473
Published: June 05, 2015
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2015 Volume 70 Issue 6 Pages
474-501
Published: June 05, 2015
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Article type: Appendix
2015 Volume 70 Issue 6 Pages
502-503
Published: June 05, 2015
Released on J-STAGE: August 21, 2019
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