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cond-mat.stat-mech2002★ 4 cited
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…
cond-mat.stat-mech1998
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…
cond-mat.stat-mech1997
Renormalization group for renormalization-group equations toward the universality classification of infinite-order phase transitions
Chigak Itoi, Hisamitsu Mukaida
We derive a new renormalization group to calculate a non-trivial critical exponent of the divergent correlation length which gives a universality classification of essential singul…