24 citations · 26 across the 6 of their papers we have counts for
13 papers
Lattice-fermionic Casimir effect and topological insulators
Tsutomu Ishikawa, Katsumasa Nakayama, Kei Suzuki
The Casimir effect arises from the zero-point energy of particles in momentum space deformed by the existence of two parallel plates. For degrees of freedom on the lattice, its ene…
Casimir effect for lattice fermions
Tsutomu Ishikawa, Katsumasa Nakayama, Kei Suzuki
We propose a definition of the Casimir energy for free lattice fermions. From this definition, we study the Casimir effects for the massless or massive naive fermion, Wilson fermio…
Charmonium contribution to $B \rightarrow K\ell^+\ell^-: testing the factorization approximation on the lattice
Katsumasa Nakayama, Tsutomu Ishikawa, Shoji Hashimoto
We report the current status of a study of charmonium contribution to on the lattice. Our lattice calculation tests the factorization approximation fo…
Renormalization of bilinear and four-fermion operators through temporal moments
Tsutomu Ishikawa, Katsumasa Nakayama, Shoji Hashimoto
We propose a renormalization scheme that can be simply implemented on the lattice. It consists of the temporal moments of two-point and three-point functions calculated with finite…
A lattice formulation of the Atiyah-Patodi-Singer index
Hidenori Fukaya, Naoki Kawai, Yoshiyuki Matsuki +4
Atiyah-Singer index theorem on a lattice without boundary is well understood owing to the seminal work by Hasenfratz et al. But its extension to the system with boundary (the so-ca…
Renormalization group on a triad network
Daisuke Kadoh, Katsumasa Nakayama
We propose a new renormalization scheme of tensor networks made only of third order tensors. The isometry used for coarse-graining the network can be prepared at an comput…