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5 papers · 1 filter
A Role of the Quasiparticle in the Conservation of the Fermion Number
Y. Tsue, C. Providencia, J. da Providencia +1
The role of the "quasiparticle" introduced in last paper by the present authors is discussed. It serves as a guide for the deformation of the Cooper-pair in the BCS-Bogoliubov appr…
The BCS-Bogoliubov and the su(2)-Algebraic Approach to the Pairing Model in Many-Fermion System
Y. Tsue, C. Providencia, J. da Providencia +1
The relation between two approaches to the su(2)-algebraic many-fermion model is discussed: (1) the BCS-Bogoliubov approach in terms of the use of the quasiparticles representing a…
Effective Potential Approach to Quark Ferromagnetization in High Density Quark Matter
Y. Tsue, J. da Providencia, C. Providencia +1
A possibility of spontaneous magnetization in high density symmetric quark matter is investigated using the NJL type effective model of QCD by means of an effective potential with…
On the conservativeness and the recurrence of symmetric jump-diffusions
Jun Masamune, Toshihiro Uemura, Jian Wang
Sufficient conditions for a symmetric jump-diffusion process to be conservative and recurrent are given in terms of the volume of the state space and the jump kernel of the process…
Jump-type Hunt processes generated by lower bounded semi-Dirichlet forms
Masatoshi Fukushima, Toshihiro Uemura
Let be a locally compact separable metric space and be a positive Radon measure on it. Given a nonnegative function defined on off the diagonal whose anti-s…