62 citations
2 papers
cs.IT2008★ 1 cited
Computation of Grobner basis for systematic encoding of generalized quasi-cyclic codes
Vo Tam Van, Hajime Matsui, Seiichi Mita
Generalized quasi-cyclic (GQC) codes form a wide and useful class of linear codes that includes thoroughly quasi-cyclic codes, finite geometry (FG) low density parity check (LDPC)…
cond-mat.str-el2003★ 62 cited
Nonlinear Sigma model method for the J1-J2 Heisenberg model: disordered ground state with plaquette symmetry
Ken'ichi Takano, Yoshiya Kito, Yoshiaki Ono +1
A novel nonlinear sigma model method is proposed for the two-dimensional J1-J2 model, which is extended to include plaquette-type distortion. The nonlinear sigma model is properly…