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Article type: Cover
2002 Volume 57 Issue 1 Pages
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Article type: Appendix
2002 Volume 57 Issue 1 Pages
A-22
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Article type: Index
2002 Volume 57 Issue 1 Pages
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Article type: Index
2002 Volume 57 Issue 1 Pages
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Yosuke Nagaoka
Article type: Article
2002 Volume 57 Issue 1 Pages
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Yoichiro Nambu
Article type: Article
2002 Volume 57 Issue 1 Pages
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This is a narrative on particle physics in its formative years viewed through my own work and experience.
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Masahide Sasaki, Masashi Ban
2002 Volume 57 Issue 1 Pages
9-21
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Conventional information theory is based on mathematical modeling of information processing by physical entities obeying the law of classical physics. This modeling is, however, an incomplete approximation, and information theory should eventually be reconstructed according to the more basic principle, quantum mechanics. The studies in this direction has been initiated in 60's, and much accelerated since 90's. This new theory, quantum information theory, is to clarify new information processings assisted by quantum effects and their performance limits while naturally comprehending conventional theory. In this article, its basic notions and open problems are reviewed from the viewpoint of communication theory.
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Ken-ichi Nakao
2002 Volume 57 Issue 1 Pages
22-27
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General relativity predicts that a massive star will experience the supernova explosion and then gravitationally collapse into spacetime singularities at the final stage of its evolution. Cosmic censorship conjecture proposed by R.Penrose states that such spacetime singularities are not observable. However, many detailed studies revealed that there are candidates of the counter example to this conjecture. The counter example is called the naked singularity. In this article, I would like to briefly review the gravitational collapse which forms or might form naked singularities and then introduce recent studies about gravitational waves generated in the course of the naked singularity formation.
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Takafumi Sato, Takashi Takahashi
2002 Volume 57 Issue 1 Pages
28-36
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The recent remarkable progress in the energy and momentum resolutions in angle-resolved photoemission spectroscopy(ARPES)has been revealing the intriguing nature of quasiparticles(QPs)in high-temperature(T
c)superconductors(HTSCs). It has been found that the lifetime and the energy dispersion of QPs observed by ARPES are closely related to the anomalous physical properties of the HTSCs as well as the mechanism of high-T
c superconductivity. In this article, we review recent ARPES studies on the behavior of QPs in HTSCs and discuss the implications.
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Ken-ichiro Arita, Kenichi Matsuyanagi
2002 Volume 57 Issue 1 Pages
37-45
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In finite quantum systems such as nuclei, metallic clusters and quantum dots, concept of independent-particle motion in the mean field holds in a good approximation; structure of the single-particle-energy levels, obtained by quantizing this motion of constituent particles, affects the dynamics of whole system in a crucial way. Regular oscillatory pattern in the coarse-grained energy spectrum is called "shell structure", and it has intimate relationships with periodic orbits in the corresponding classical system. In this article, we discuss 1)quantum-classical correspondence in shell structure and 2)how new deformed shell structure emerges due to periodic-orbit bifurcation associated with deformation of the mean field.
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Susumu Noda
2002 Volume 57 Issue 1 Pages
46-49
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Recently, there have been increasing interests in a photonic crystal which has a great potential to manipulate photons arbitrarily. In this article, so-called "defect engineering" which enables us to manipulate photons is described, where unique phenomenon of trapping and emission of photons by a single defect in photonic crystal is demonstrated as an example.
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[in Japanese]
Article type: Article
2002 Volume 57 Issue 1 Pages
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[in Japanese]
Article type: Article
2002 Volume 57 Issue 1 Pages
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[in Japanese]
Article type: Article
2002 Volume 57 Issue 1 Pages
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[in Japanese]
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2002 Volume 57 Issue 1 Pages
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2002 Volume 57 Issue 1 Pages
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2002 Volume 57 Issue 1 Pages
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Article type: Article
2002 Volume 57 Issue 1 Pages
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Article type: Article
2002 Volume 57 Issue 1 Pages
53-54
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2002 Volume 57 Issue 1 Pages
54-55
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Article type: Appendix
2002 Volume 57 Issue 1 Pages
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Article type: Appendix
2002 Volume 57 Issue 1 Pages
57-62
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Article type: Appendix
2002 Volume 57 Issue 1 Pages
63-64
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2002 Volume 57 Issue 1 Pages
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Article type: Appendix
2002 Volume 57 Issue 1 Pages
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Article type: Appendix
2002 Volume 57 Issue 1 Pages
74-78
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