3 papers
hep-th2005
Solitons of Sigma Model on Noncommutative Space as Solitons of Electron System
H. Otsu, T. Sato, H. Ikemori +1
We study the relationship of soliton solutions for electron system with those of the sigma model on the noncommutative space, working directly in the operator formalism. We find th…
hep-th2004
Lost equivalence of nonlinear sigma and models on noncommutative space
H. Otsu, T. Sato, H. Ikemori +1
We show that the equivalence of nonlinear sigma and models which is valid on the commutative space is broken on the noncommutative space. This conclusion is arrived at thr…
hep-th2003
New BPS Solitons in 2+1 Dimensional Noncommutative CP^1 Model
H. Otsu, T. Sato, H. Ikemori +1
Investigating the solitons in the non-commutative model, we have found a new set of BPS solitons which does not have counterparts in the commutative model.