25 citations · 33 across the 2 of their papers we have counts for
4 papers
A Z index of Dirac operator with time reversal symmetry
T. Fukui, T. Fujiwara
With time reversal symmetry a Dirac operator has vanishing index and Chern number. We show that we can nevertheless define a nontrivial Z index as well as a corresponding topol…
Topological meaning of Z numbers in time reversal invariant systems
T. Fukui, T. Fujiwara, Y. Hatsugai
We show that the Z invariant, which classifies the topological properties of time reversal invariant insulators, has deep relationship with the global anomaly. Although the sec…
Canonical Approach to Ginsparg-Wilson Fermion
Kosuke Matsui, Tomohiro Okamoto, Takanori Fujiwara
Based upon the lattice Dirac operator satisfying the Ginsparg-Wilson relation, we investigate canonical formulation of massless fermion on the spatial lattice. For free fermion sys…
Wess-Zumino-Witten term on the lattice
Takanori Fujiwara, Kosuke Matsui, Hiroshi Suzuki +1
We construct the Wess-Zumino-Witten (WZW) term in lattice gauge theory by using a Dirac operator which obeys the Ginsparg-Wilson relation. Topological properties of the WZW term kn…