著者

SOTANI Hajime

出版者

Publication Office, Progress of Theoretical Physics

雑誌

Progress of theoretical physics. Supplement (ISSN:03759687)

巻号頁・発行日

no.196, pp.471-475, 2012-10-22

参考文献数

10

被引用文献数

1

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We show that the shear modes in the neutron star crust are quite sensitive to the existence of nonuniform nuclear structures, the so-called "pasta". Due to the existence of pasta phase, the frequencies of shear modes are reduced, where the dependence of fundamental frequency is different from that of overtones. Since the torsional shear frequencies depend strongly on the structure of pasta phase, through the observations of stellar oscillations, one can probe the pasta structure in the crust, although that is quite difficult via the other observations. Additionally, considering the effect of pasta phase, we show the possibility to explain the all observed frequencies in the SGR 1806-20 with using only crust torsional shear modes.

著者

Hushimi Kodi Syozi Itiro Department of Physics Osaka University Department of Physics Osaka University

出版者

Publication Office, Progress of Theoretical Physics

雑誌

理論物理学の進歩 (ISSN:0033068X)

巻号頁・発行日

vol.5, no.2, pp.177-186, 1950-04

被引用文献数

3 33

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After the matrix method in crystal statistics was introduced by R. Kubo^(1) Kramers and Wannier^(2), and others, Onsager^(3), using the abstract algebraic method, got the exact solution in the case of plane square net. His rather complicated method was simplified by Nambu^(6) considerably. We, independenty, attained the simplification of Onsager's method and have applied to the honeycomb lattice. And the exact solution has been obtained. From this, by the so called dual transformation we can get the partition function for triangular net. The Curie point occurs at ch 2H=2 in the honeycomb lattice and at exp (4H)=3 in the triangular net. These coincide with the resnlts obtained by the dual and star-triangle transformations^(4). The specific heat becomes logarithmically infinite but the energy itself remains continuous at this temperature. In the antiferromagnetic case, the honeycomb lattice behaves similar to the former case but the triangular net exhibits no phase change.

著者

Takabayashi Takehiko Atomic Energy Research Institute Nihon University

出版者

Publication Office, Progress of Theoretical Physics

雑誌

Progress of theoretical physics. Supplement = Progress of theoretical physics. Supplement (ISSN:03759687)

巻号頁・発行日

vol.86, pp.81-92, 1986-08-30

被引用文献数

2

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Some aspects of the theory of relativistic string in its early period of formation and development are examined, such as the analogy between multilocal theory and string theory, the motivation and implication of the concept of `detailed wave equation', distinction between geometric and massive strings, etc. Next it is shown that a multilocal system consisting of N points organizes itself into a one-dimensional arrangement, rather than into a 3-dimensionally extended structure, if the internal forces obey a certain conspicuous rule. This model exhibits how the string theory is fabricated out of the relativistic theory of a discrete structure in the limit N →∞.

著者

Kugo Taichiro Ojima Izumi Department of Physics Kyoto University Research Institute for Mathematical Sciences Kyoto University

出版者

Publication Office, Progress of Theoretical Physics

雑誌

Supplement of the Progress of theoretical physics = Supplement of the Progress of theoretical physics (ISSN:03759687)

巻号頁・発行日

vol.66, pp.1-130, 1979-12-20

被引用文献数

4 935

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A manifestly covariant and local canonical operator formalism of non-Abelian gauge theories is presented in its full detail. This formalism, applicable to Yang-Mills theories as well as to gravity, not only provides us a transparent understanding in the scattering theoretical aspects, but also makes it possible to discuss other important problems directly related to the (Heisenberg) operators and the state vectors: As for the former, the physical S-matrix unitarity is proved quite generally on the basis of the representation of the algebra of the BRS charge, and asymptotic field analysis is explicitly performed for some examples. As for the latter, the problems of observables and the well-definedness of charge operators are discussed and clear results are obtained, where the locality and covariance of the formalism are indispensable. Observables are shown to be invariant under the BRS transformation as well as the unbroken global gauge groups. By analyzing the structure of "Maxwell" equations in YM theories, the converse of the Higgs theorem is found to hold. This turns out to lead to a remarkably simple criterion of quark confinement in QCD. The present formalism is found useful also for the U(1) problem and the charge universality proof in the Weinberg-Salam model. General theory of indefinite metric quantum fields is developed to some extent.

著者

MATSUI T. Institute of Physics University of Tokyo

出版者

Publication Office, Progress of Theoretical Physics

雑誌

Progress of theoretical physics (ISSN:0033068X)

巻号頁・発行日

vol.126, no.6, pp.1167-1176, 2011-12-25

参考文献数

21

被引用文献数

5

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We calculate the relative abundance of the radioactive isotopes Iodine-131 and Cesium-137 produced by nuclear fission in reactors and compare it with data taken at the troubled Fukushima Dai-ichi nuclear power plant. The ratio of radioactivities of these two isotopes can be used to obtain information about when the nuclear reactions terminated.