4 citations · 7 across the 4 of their papers we have counts for
10 papers
Gapless Excitation above a Domain Wall Ground State in a Flat Band Hubbard Model
Makoto Homma, Chigak Itoi
We construct a set of exact ground states with a localized ferromagnetic domain wall and with an extended spiral structure in a deformed flat-band Hubbard model in arbitrary dimens…
Ferromagnetic Domain Wall Ground States in One-Dimensional Deformed Flat-Band Hubbard Model
Makoto Homma, Chigak Itoi
We construct a set of exact ground states with a localized ferromagnetic domain wall and an extended spiral structure in a quasi-one-dimensional deformed flat-band Hubbard model. I…
Coleman's theorem on physical assumptions for no Goldstone bosons in two dimensions
Chigak Itoi
Thirty years ago, Coleman proved that no continuous symmetry is broken spontaneously in a two-dimensional relativistic quantum field theory. In his argument, however, it is difficu…
Exact solutions of domain wall and spiral ground states in Hubbard models
Makoto Homma, Chigak Itoi
We construct a set of exact ground states with a localized ferromagnetic domain wall and an extended spiral structure in a deformed flat-band Hubbard model. In the case of quarter…
Random field O(N) spin model near four dimensions
Chigak Itoi, Hisamitsu Mukaida, Yoshinori Sakamoto
This paper has been withdrawn by the authors, due to a crucial error in beta functions.
Three loop renormalization group for a marginally perturbed SU(2) WZW model
Chigak Itoi
Employing a simple calculation method obtained by M.-H. Kato, we calculate the three loop renormalization group in the coset conformal field theory with a slightly relevant…