118 citations · 573 across the 30 of their papers we have counts for
30 papers
Ground-state phase diagram of anisotropically interacting Heisenberg- models on a honeycomb lattice
Takafumi Suzuki, Takuto Yamada, Sei-ichiro Suga
In this paper, we investigate the ground-state phase diagram of the Heisenberg- model on a honeycomb lattice by dimer series expansion and exact diagonalization. We focu…
Anisotropy as a diagnostic test for distinct tensor network wavefunctions of integer and half-integer spin Kitaev quantum spin liquids
Hyun-Yong Lee, Takafumi Suzuki, Yong Baek Kim +1
Contrasting ground states of quantum magnets with the integer and half-integer spin moments are the manifestation of many-body quantum interference effects. In this work, we invest…
Ground-state properties of the model on a honeycomb lattice
Takuto Yamada, Takafumi Suzuki, Sei-ichiro Suga
We investigate the ground-state properies of the model on a honeycomb lattice using series expansions and numerical exact diagonalizations, where the model includes Kitaev ($…
Frustration-Induced Supersolid Phases of Extended Bose-Hubbard Model in the Hard-Core Limit
Wei-Lin Tu, Huan-Kuang Wu, Takafumi Suzuki
We investigate exotic supersolid phases in the extended Bose-Hubbard model with infinite projected entangled-pair state, numerical exact diagonalization, and mean-field theory. We…
Quantized ΔS=2 Excitation Spectra by Confinement in an S=1 Spin Chain
Takafumi Suzuki, Sei-ichiro Suga
We calculate the dynamical spin-structure factor of the Ising spin chain with negative single-ion anisotropy in magnetic fields using the infinite time-evolving-block-decimat…
Quantized excitation spectra by magnon confinement in quasi-one-dimensional S=1 spin systems
Takafumi Suzuki, Sei-ichiro Suga
We apply the infinite time-evolving-block-decimation algorithm to calculate the dynamical spin-structure factors of the quasi-one-dimensional (q1D) S=1 antiferromagnetic spin syste…
Excitons and Dark Fermions as Origins of Mott Gap, Pseudogap and Superconductivity in Cuprate Superconductors --- General Idea and Basic Concept Based on Gap Physics
Masatoshi Imada, Takafumi J. Suzuki
Theory of doped Mott insulators is revisited in the light of recent understanding on the singular self-energy structure of the single-particle Green's function. The unique pole str…
Numerical Algorithm for Exact Finite Temperature Spectra and Its Application to Frustrated Quantum Spin Systems
Youhei Yamaji, Takafumi Suzuki, Mitsuaki Kawamura
A numerical algorithm to calculate exact finite-temperature spectra of many-body lattice Hamiltonians is formulated by combining the typicality approach and the shifted Krylov subs…
Effective model with strong Kitaev interactions for -
Takafumi Suzuki, Sei-ichiro Suga
We use an exact numerical diagonalization method to calculate the dynamical spin structure factors (DSFs) of three ab-initio models and one ab-initio-guided model for a honeycomb-l…
Twistor formulation of a massive particle with rigidity
Shinichi Deguchi, Takafumi Suzuki
A massive rigid particle model in dimensions is reformulated in terms of twistors. Beginning with a first-order Lagrangian, we establish a twistor representation of the Lag…
Coherent Transport of Levitons Through the Kondo Resonance
Takafumi J. Suzuki
We study coherent transport of levitons through a single-level quantum dot system driven by Lorentzian-shaped voltage pulses. We demonstrate the repeated emergence of the Kondo res…
Non-Gaussianity in a quasiclassical electronic circuit
Takafumi J. Suzuki, Hisao Hayakawa
We study the non-Gaussian dynamics of a quasiclassical electronic circuit inductively coupled to a mesoscopic conductor. Non-Gaussian noise accompanying the nonequilibrium transpor…
Clues and criteria for designing Kitaev spin liquid revealed by thermal and spin excitations of honeycomb iridates NaIrO
Youhei Yamaji, Takafumi Suzuki, Takuto Yamada +3
Contrary to the original expectation, NaIrO is not a Kitaev's quantum spin liquid (QSL) but shows a zig-zag-type antiferromagnetic order in experiments. Here we propose exp…
Dynamical properties of the honeycomb-lattice Iridates
Takafumi Suzuki, Takuto Yamada, Youhei Yamaji +1
We investigate the dynamical properties of . For five effective models proposed for , we numerically calculate dynamical structure factors (DSFs)…
Unavoidable Gapless Boundary State and Boundary Superfluidity of Trapped Bose Mott States in Two-Dimensional Optical Lattices
Takafumi Suzuki, Masahiro Sato
We study the boundary nature of trapped bosonic Mott insulators in optical square lattices, by performing quantum Monte Carlo simulation. We show that a finite superfluid density g…
Thermal Phase Transition of Generalized Heisenberg Models for SU(N) Spins on Square and Honeycomb Lattices
Takafumi Suzuki, Kenji Harada, Haruhiko Matsuo +2
We investigate thermal phase transitions to a valence-bond solid phase in SU(N) Heisenberg models with four- or six-body interactions on a square or honeycomb lattice, respectively…
Relativistic Lagrangians for the Lorentz-Dirac equation
Shinichi Deguchi, Kunihiko Nakano, Takafumi Suzuki
We present two types of relativistic Lagrangians for the Lorentz-Dirac equation written in terms of an arbitrary world-line parameter. One of the Lagrangians contains an exponentia…
Effects of Coulomb interaction on photon-assisted current noises through a quantum dot
Takafumi J. Suzuki, Takeo Kato
We study photon-assisted transport in a single-level quantum dot system under a periodically oscillating field. Photon-assisted current noises in the presence of the Coulomb intera…
Spinor and twistor formulations of massless particles with rigidity
Shinichi Deguchi, Takafumi Suzuki
The 4-dimensional model of a massless particle with rigidity whose Lagrangian is proportional to its world-line curvature is reformulated in terms of spinor and twistor variables.…
Canonical formalism and quantization of a massless spinning bosonic particle in four dimensions
Shinichi Deguchi, Shouma Negishi, Satoshi Okano +1
A twistor model of a free massless spinning particle in 4-dimensional Minkowski space is studied in terms of spacetime and spinor variables. This model is specified by a simple act…
Possibility of Deconfined Criticality in SU(N) Heisenberg Models at Small N
Kenji Harada, Takafumi Suzuki, Tsuyoshi Okubo +5
To examine the validity of the scenario of the deconfined critical phenomena, we carry out a quantum Monte Carlo simulation for the SU() generalization of the Heisenberg model w…
Parallelized Quantum Monte Carlo Algorithm with Nonlocal Worm Updates
Akiko Masaki-Kato, Takafumi Suzuki, Kenji Harada +2
Based on the worm algorithm in the path-integral representation, we propose a general quantum Monte Carlo algorithm suitable for parallelizing on a distributed-memory computer by d…
Long distance entanglement in one-dimensional quantum systems under sinusoidal deformation
Toshiya Hikihara, Takafumi Suzuki
We investigate entanglement generation in one-dimensional quantum spin systems with the sinusoidal deformation. In the system, the energy scale of each local term in the Hamiltonia…
Study of the Shastry Sutherland Model Using Multi-scale Entanglement Renormalization Ansatz
Jie Lou, Takafumi Suzuki, Kenji Harada +1
We performed variational calculation based on the multi-scale entanglemnt renormalization ansatz, for the antiferromagnetic Heisenberg model on a Shastry Sutherland lattice (SSL).…