67 citations · 177 across the 9 of their papers we have counts for
9 papers
New Structural Quantum Circuit Simulating a Toffoli Gate
Masanari Asano, Chikara Ishii
A Toffoli gate (-NOT gate) is regarded as an important unitary gate in quantum computation, and is simulated by a quantum circuit composed of -NOT gates. This paper p…
Low-energy excitations in a one-dimensional orthogonal dimer model with the Dzyaloshinski-Moriya interaction
Kenji Sasaoka, Chikara Ishii
Effects of the Dzyaloshinski-Moriya (DM) interaction on low-energy excitations in a one-dimensional orthogonal-dimer model are studied by using the perturbation expansions and the…
Magnetization cusp singularities of frustrated Kondo necklace model
Takahiro Yamamoto, Rumi Manago, Yoshihiro Mori +1
Magnetization processes of frustrated Kondo necklace model are studied by means of a density matrix renormalization group (DMRG) method and an elementary band theory based on a bon…
Phase diagram and critical properties of the frustrated Kondo necklace model in a magnetic field
Takahiro Yamamoto, Koichiro Ide, Chikara Ishii
The critical properties of the frustrated Kondo necklace model with a half saturation magnetization () have been studied by means of an exact-diagonalization method. It is s…
Spin-Wave Excitations of Half-Filled Kondo Lattice Model
Yasuhiro Matsushita, Ryousuke Shiina, Chikara Ishii
The spin excitations in the antiferromagnetic phase of half-filled Kondo lattice model are studied by means of the decoupling approximation for spin Green's function. The spin-wave…
Bond-Operator Mean Field Theory for the Bilayer Heisenberg Model
Yasuhiro Matsushita, Martin P. Gelfand, Chikara Ishii
Bond-operator mean field equations for the square-lattice, S=1/2 bilayer Heisenberg model are developed and solved numerically. In the vicinity of both the zero-field critical poin…