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Article type: Cover
2014 Volume 69 Issue 7 Pages
Cover1-
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Tomi Ohtsuki
Article type: Article
2014 Volume 69 Issue 7 Pages
439-
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Article type: Index
2014 Volume 69 Issue 7 Pages
440-441
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Yasushi Suto
Article type: Article
2014 Volume 69 Issue 7 Pages
442-443
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Shinji Tsujikawa
Article type: Article
2014 Volume 69 Issue 7 Pages
444-452
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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The observational evidence of dark energy is one of the most serious problems in modern cosmology. From the joint constraints on the dark energy equation of state using the recent data of SN Ia, CMB and BAO, there is a possibility that the gravitational law may be modified from General Relativity at large distances. We review a number of theoretical models of modified gravity which can account for the cosmic acceleration, while recovering the General Relativistic behavior in the solar system. We also discuss the growth of structures in modified gravity models in order to confront them with the observations of galaxy clusterings and weak lensing.
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Ryusuke Matsunaga, Ryo Shimano
Article type: Article
2014 Volume 69 Issue 7 Pages
453-458
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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By using the intense THz pump-THz probe spectroscopy, we observed the collective Higgs amplitude mode of the s-wave BCS order parameter in nonadiabatically-excited superconducting Nb_<1-x>Ti_xN films. The oscillation frequency is in good agreement with the asymptotic value of the BCS gap energy, indicating the appearance of the coherent oscillation of the order parameter amplitude. The result opens a new avenue to the ultrafast manipulation of the superconducting order parameter driven by a strong AC field.
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Noriyuki Kodera, Takayuki Uchihashi, Toshio Ando
Article type: Article
2014 Volume 69 Issue 7 Pages
459-464
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Biological molecules (proteins and nucleic acids) perform sophisticated functions by changing their structures and interactions with partners. Therefore, directly observing biomolecules in action at high spatiotemporal resolution must be the most straightforward approach to understanding how they function. However, such an observation has long been infeasible because of a lack of techniques that meet all the required conditions (i.e. nanometer resolution, high temporal resolution, in-liquid observation, direct visualization without markers, and low-invasiveness). To make it possible, we have developed high-speed atomic force microscopy (HS-AFM), which has now reached its maturity. In this article, we first overview the essential techniques to realize the HS-AFM and then show an example of its application study demonstrating the power of HS-AFM. The HS-AFM technique is applicable to not only biological phenomena but also various physical and chemical phenomena occurring dynamically in liquids at the nanometer scale.
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Masaaki Nakamura, Zheng-Yuan Wang
Article type: Article
2014 Volume 69 Issue 7 Pages
465-469
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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We introduce one-dimensional lattice models with exact matrix-product ground states describing the fractional quantum Hall states in Laughlin series (given by filling factors ν=1/q) on torus geometry. The obtained exact ground states well describe properties of the Laughlin wave function. Using the matrix product method, density functions and correlation functions are calculated analytically. Especially, obtained entanglement spectra reflect properties of chiral Tomonaga Luttinger liquid of the gapless edge states.
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Takahiro Miyoshi
Article type: Article
2014 Volume 69 Issue 7 Pages
470-476
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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This article describes numerical techniques to remove the influence of numerical magnetic monopole, ∇・B, in magnetohydrodynamic (MHD) numerical simulations. The techniques are categorized into three groups: 1. solving an additional system of equations, 2. specially discretizing the induction equation, 3. following the time evolution of the magnetic monopole. The basic concept described here must be applicable to other systems of evolution equations with constraints.
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[in Japanese]
Article type: Article
2014 Volume 69 Issue 7 Pages
477-480
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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[in Japanese]
2014 Volume 69 Issue 7 Pages
481-492
Published: 2014
Released on J-STAGE: August 22, 2019
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[in Japanese]
2014 Volume 69 Issue 7 Pages
493-
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Article type: Appendix
2014 Volume 69 Issue 7 Pages
493-
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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[in Japanese], [in Japanese]
Article type: Article
2014 Volume 69 Issue 7 Pages
494-495
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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[in Japanese]
Article type: Article
2014 Volume 69 Issue 7 Pages
495-
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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[in Japanese]
Article type: Article
2014 Volume 69 Issue 7 Pages
496-
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Article type: Appendix
2014 Volume 69 Issue 7 Pages
497-
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Article type: Appendix
2014 Volume 69 Issue 7 Pages
497-504
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Article type: Appendix
2014 Volume 69 Issue 7 Pages
504-505
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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[in Japanese]
2014 Volume 69 Issue 7 Pages
505-506
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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2014 Volume 69 Issue 7 Pages
507-510
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Article type: Appendix
2014 Volume 69 Issue 7 Pages
513-
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Article type: Appendix
2014 Volume 69 Issue 7 Pages
514-515
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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Article type: Appendix
2014 Volume 69 Issue 7 Pages
516-
Published: July 05, 2014
Released on J-STAGE: August 22, 2019
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