25 citations · 234 across the 70 of their papers we have counts for
69 papers
A possible trial beyond the conventional random phase approximation for the su(2)-Lipkin model including the case of non-closed shell system
Y. Tsue, C. Providencia, J. da Providencia +1
Concerning the su(2)-Lipkin model, the calculation of the excitation energy to the 1st excited-state gives rise to the following fact: The two results based on the exact treatment…
Spontaneous magnetization under a pseudovector interaction between quarks in high density quark matter
M. Morimoto, Y. Tsue, J. da Providencia +2
Spontaneous magnetization and magnetic susceptibility originated from the pseudovector-type four-point interaction between quarks are calculated in quark matter with zero temperatu…
Spin polarization and color superconductivity in the Nambu--Jona-Lasinio model at finite temperature
Hiroaki Matsuoka, Yasuhiko Tsue, Joao da Providencia +2
We investigate the possible existence of spin polarization and color superconductivity in the Nambu--Jona-Lasinio model with a tensor-type interaction at finite density and tempera…
A possible quantum fluid-dynamical approach to vortex motion in nuclei
Seiya Nishiyama, Joao da Providencia
The essential point of Bohr-Mottelson theory is to assume a irrotational flow. As was already suggested by Marumori and Watanabe, the internal rotational motion, i.e., the vortex m…
Spin polarization in high density quark matter under a strong external magnetic field
Yasuhiko Tsue, Joao da Providencia, Constanca Providencia +2
In high density quark matter under a strong external magnetic field, possible phases are investigated by using the two-flavor Nambu-Jona-Lasinio model with tensor-type four-point i…
Velocity operator approach to quantum fluid dynamics in a three-dimensional neutron-proton system
Seiya Nishiyama, Joao da Providencia
In the preceeding paper, introducing isospin-dependent density operators and defining exact momenta (collective variables), we could get an exact canonically momenta approach to a…