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15 papers · 1 filter
Bifurcation at the c=3/2 Takhtajan-Babujian point to the c=1 critical lines
Atsuhiro Kitazawa, Kiyohide Nomura
We study the S=1 quantum spin chains with bilinear, biquadratic, plus bond alternation in the vicinity of the S=1 Takhtajan-Babujian model. Transition line between the Haldane and…
Hirota bilinear forms with 2-toroidal symmetry
K. Iohara, Y. Saito, M. Wakimoto
In this note, we compute Hirota bilinear forms arising from both homogeneous and principal realization of vertex representations of 2-toroidal Lie algebras of type .
The Auxiliary Field Method as a Powerful Tool for Nonperturbative Study
Taro Kashiwa
The auxiliary field method, defined through introducing an auxiliary (also called as the Hubbard-Stratonovich or the Mean-) field and utilizing a loop-expansion, gives an excellent…
Magnetization plateau and quantum phase transition of the S=1/2 trimerized XXZ spin chain
Kiyomi Okamoto, Atsuhiro Kitazawa
We study the plateau of the magnetization curve at ( is the saturation magnetization) of the trimerized spin chain. By examining the leve…
Dynamical stability of the crack front line
Takayasu Fukuhara, Hiizu Nakanishi
Dynamical stability of the crack front line that propagates between two plates is studied numerically using the simple two-dimensional mass-spring model. It is demonstrated that th…
Absence of surface mode in a visco-elastic material with surface tension
Hiizu Nakanishi, Satoshi Kubota
The surface waves in the visco-elastic media with the surface tension are studied using the Voigt-Kelvin model of the visco-elasticity. It is shown that the surface mode of oscilla…