399 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of KochiJP206 papers
- The University of TokyoJP86 papers
- Kansai UniversityJP69 papers
- University of CoimbraPT69 papers
- High Energy Accelerator Research OrganizationJP48 papers
- Tokyo City UniversityJP45 papers
- University of UtahUS45 papers
- Yonsei UniversityKR45 papers
- Université Libre de BruxellesBE44 papers
- Kyoto UniversityJP41 papers
- The University of OsakaJP39 papers
- Tokyo Institute of TechnologyJP38 papers
14 papers · 1 filter
BEC-Polaron gas in a boson-fermion mixture : a many-body extension of Lee-Low-Pines theory
Eiji Nakano, Hiroyuki Yabu
We investigate the ground state properties of the gaseous mixture of a single species of bosons and fermions at zero temperature, where bosons are major in population over fermions…
Possible identifications of newly observed magnetar quasi-periodic oscillations as crustal shear modes
Hajime Sotani, Kei Iida, Kazuhiro Oyamatsu
Quasi-periodic oscillations (QPOs) discovered in soft-gamma repeaters (SGRs) are expected to help us to study the properties of matter in neutron stars. In earlier investigations,…
A possible framework of the Lipkin model obeying the su(n)-algebra in arbitrary fermion number. I --- The su(2)-algebras extended from the conventional fermion-pair and determination of the minimum weight states ---
Yasuhiko Tsue, Constanca Providencia, Joao da Providencia +1
The minimum weight states of the Lipkin model consisting of n single-particle levels and obeying the su(n)-algebra are investigated systematically. The basic idea is to use the su(…
Spontaneous magnetization in high-density quark matter
Y. Tsue, J. da Providencia, C. Providencia +2
It is shown that the spontaneous magnetization occurs due to the anomalous magnetic moments of quarks in the high-density quark matter under the tensor-type four-point interaction.…
Relation between - hybridization and magnetic ordering in CeRuAl: An optical conductivity study of Ce(RuRh)Al ()
Shin-ichi Kimura, Hiroshi Tanida, Masafumi Sera +5
A Kondo semiconductor CeRuAl with an orthorhombic crystal structure shows an unusual antiferromagnetic ordering at rather high temperature of 27.3 K, which is lowe…
Certain maps preserving self-homotopy equivalences
Jin-ho Lee, Toshihiro Yamaguchi
Let be the group of homotopy classes of self homotopy equivalences for a connected CW complex . We observe two classes of maps -maps and co-$\mathc…
Measurement of the Proton-Air Cross Section with Telescope Array's Middle Drum Detector and Surface Array in Hybrid Mode
R. U. Abbasi, M. Abe, T. Abu-Zayyad +122
In this work we are reporting on the measurement of the proton-air inelastic cross section using the Telescope Array (TA) detector. Based on the measurem…
Sullivan minimal models of classifying spaces for non-formal spaces of small rank
Hirokazu Nishinobu, Toshihiro Yamaguchi
We consider certain rational homotopical conditions of simly connected CW complex such that the rational cohomology of the classifying space for fibrations with two-s…
Landau-Peierls instability in a Fulde-Ferrell type inhomogeneous chiral condensed phase
Tong-Gyu Lee, Eiji Nakano, Yasuhiko Tsue +2
We investigate the stability of an inhomogeneous chiral condensed phase against low energy fluctuations about a spatially modulated order parameter. This phase corresponds to the s…
A possibility of quark spin polarized phase in high density quark matter
Y. Tsue, J. da Providencia, C. Providencia +2
It is shown that the quark spin polarization may occur for each quark flavor by the use of the Nambu-Jona-Lasinio model with a tensor-type four-point interaction between quarks, wh…
Phase structure of two-color QCD at real and imaginary chemical potentials; lattice simulations and model analyses
Takahiro Makiyama, Yuji Sakai, Takuya Saito +6
We investigate the phase structure of two-color QCD at both real and imaginary chemical potentials mu, performing lattice simulations and analyzing the data with the Polyakov-loop…
Pressure-Induced Valence Crossover and Novel Metamagnetic Behavior near the Antiferromagnetic Quantum Phase Transition of YbNiGa
K. Matsubayashi, T. Hirayama, T. Yamashita +7
We report electrical resistivity, ac magnetic susceptibility and X-ray absorption spectroscopy measurements of intermediate valence YbNiGa under pressure and magnetic f…
Constraining the density dependence of the nuclear symmetry energy from an X-ray bursting neutron star
Hajime Sotani, Kei Iida, Kazuhiro Oyamatsu
Neutrons stars lighter than the Sun are basically composed of nuclear matter of density up to around twice normal nuclear density. In our recent analyses, we showed that possible s…
New boson realization of the Lipkin model obeying the su(2)-algebra
Y. Tsue, C. Providencia, J. da Providencia +1
New boson representation of the su(2)-algebra proposed by the present authors for describing the damped and amplified oscillator is examined in the Lipkin model as one of simple ma…