141 citations · 659 across the 34 of their papers we have counts for
34 papers
Embedding Paired Free-Fermion Gaussian States into Gutzwiller-Projected Bardeen--Cooper--Schrieffer Wave Functions
Ryui Kaneko
Gutzwiller-projected Bardeen--Cooper--Schrieffer (BCS) wave functions of Abrikosov fermions are widely used to describe quantum many-body states. Taking the one-dimensional transve…
Microscopic mechanism of high-temperature superconductivity revealed by ab initio studies on hole-doped multilayer cuprates HgBaCaCuO under pressure
Ryui Kaneko, Masatoshi Imada
Triple-layer cuprate superconductor (Hg1223) keeps the record of the highest superconducting (SC) critical temperature K among all the e…
Adaptive Interpolating Quantum Transform: A Quantum-Native Framework for Efficient Transform Learning
Gekko Budiutama, Shunsuke Daimon, Hirofumi Nishi +3
Machine learning on quantum computers has attracted attention for its potential to deliver computational speedups in different tasks. However, deep variational quantum circuits req…
Seeding neural network quantum states with tensor network states
Ryui Kaneko, Shimpei Goto
We find an efficient approach to approximately convert matrix product states (MPSs) into restricted Boltzmann machine wave functions consisting of a multinomial hidden unit through…
Entanglement entropy dynamics of non-Gaussian states in free boson systems: Random sampling approach
Ryui Kaneko, Daichi Kagamihara, Ippei Danshita
We develop a random sampling method for calculating the time evolution of the Rényi entanglement entropy after a quantum quench from an insulating state in free boson systems. Beca…
Ground-state phase diagram of the SU() Heisenberg model on a plaquette lattice
Ryui Kaneko, Shimpei Goto, Ippei Danshita
We investigate the ground state of the SU() Heisenberg model on a square lattice with spatial anisotropy on each plaquette bond using the tensor-network method based on infinite…
Surface criticality in the mixed-field Ising model with sign-inverted next-nearest-neighbor interaction
Yuki Nakamura, Ryui Kaneko, Ippei Danshita
Rydberg atoms in an optical tweezer array have been used as a quantum simulator of the spin- antiferromagnetic Ising model with longitudinal and transverse fields. We suggest…
Forecasting long-time dynamics in quantum many-body systems by dynamic mode decomposition
Ryui Kaneko, Masatoshi Imada, Yoshiyuki Kabashima +1
Reliable numerical computation of quantum dynamics is a fundamental challenge when the long-ranged quantum entanglement plays essential roles as in the cases governed by quantum cr…
Channel Attention for Quantum Convolutional Neural Networks
Gekko Budiutama, Shunsuke Daimon, Hirofumi Nishi +3
Quantum convolutional neural networks (QCNNs) have gathered attention as one of the most promising algorithms for quantum machine learning. Reduction in the cost of training as wel…
Quantum many-body scars in the Bose-Hubbard model with a three-body constraint
Ryui Kaneko, Masaya Kunimi, Ippei Danshita
We uncover the exact athermal eigenstates in the Bose-Hubbard (BH) model with a three-body constraint, motivated by the exact construction of quantum many-body scar (QMBS) states i…
Dynamics of correlation spreading in low-dimensional transverse-field Ising models
Ryui Kaneko, Ippei Danshita
We investigate the dynamical spreading of spatial correlations after a quantum quench starting from a magnetically disordered state in the transverse-field Ising model at one (1D)…
Evaluating thermal expectation values by almost ideal sampling with Trotter gates
Shimpei Goto, Ryui Kaneko, Ippei Danshita
We investigate the sampling efficiency for the simulations of quantum many-body systems at finite temperatures when initial sampling states are generated by applying Trotter gates…
Rényi entanglement entropy after a quantum quench starting from insulating states in a free boson system
Daichi Kagamihara, Ryui Kaneko, Shion Yamashika +4
We investigate the time-dependent Rényi entanglement entropy after a quantum quench starting from the Mott-insulating and charge-density-wave states in a one-dimensional free boson…
Ground-state phase diagram of a spin-1/2 frustrated XXZ ladder
Takuhiro Ogino, Ryui Kaneko, Satoshi Morita +1
We study the ground-state phase diagram of a spin- frustrated XXZ ladder, in which two antiferromagnetic chains are coupled by competing rung and diagonal interactions…
Resonant superfluidity in the Rabi-coupled spin-dependent Fermi-Hubbard model
Mathias Mikkelsen, Ryui Kaneko, Daichi Kagamihara +1
We investigate the ground-state phase diagram of the one-dimensional attractive Fermi-Hubbard model with spin-dependent hoppings and an on-site Rabi coupling using the density matr…
Tensor-network study of correlation-spreading dynamics in the two-dimensional Bose-Hubbard model
Ryui Kaneko, Ippei Danshita
Recent developments in analog quantum simulators based on cold atoms and trapped ions call for cross-validating the accuracy of quantum-simulation experiments with use of quantitat…
Symmetry-protected topological phases and competing orders in a spin-1/2 XXZ ladder with a four-spin interaction
Takuhiro Ogino, Shunsuke Furukawa, Ryui Kaneko +2
We study a spin-1/2 XXZ model with a four-spin interaction on a two-leg ladder. By means of effective field theory and matrix product state calculations, we obtain rich ground-stat…
Reentrance of the Disordered Phase in the Antiferromagnetic Ising Model on a Square Lattice with Longitudinal and Transverse Magnetic Fields
Ryui Kaneko, Yoshihide Douda, Shimpei Goto +1
Motivated by recent experiments with Rydberg atoms in an optical tweezer array, we accurately map out the ground-state phase diagram of the antiferromagnetic Ising model on a squar…
Matrix product state approach for a quantum system at finite temperatures using random phases and Trotter gates
Shimpei Goto, Ryui Kaneko, Ippei Danshita
We develop a numerical method based on matrix product states for simulating quantum many-body systems at finite temperatures without importance sampling and evaluate its performanc…
Multiple magnetization plateaus induced by farther neighbor interaction in an two-leg Heisenberg spin ladder
Hidehiko Kohshiro, Ryui Kaneko, Satoshi Morita +2
We study the magnetization process of the Heisenberg model on a two-leg ladder with farther neighbor spin-exchange interaction. We consider the interaction that couples up to…
Continuous phase transition between Neel and valence bond solid phases in a J-Q-like spin ladder system
Takuhiro Ogino, Ryui Kaneko, Satoshi Morita +2
We investigate a quantum phase transition between a Neel phase and a valence bond solid (VBS) phase, in each of which a different Z2 symmetry is broken, in a spin-1/2 two-leg XXZ l…
Magnetic field induced quantum phases in a tensor network study of Kitaev magnets
Hyun-Yong Lee, Ryui Kaneko, Li Ern Chern +4
Recent discovery of the half quantized thermal Hall conductivity in -RuCl, a candidate material for the Kitaev spin liquid, suggests the presence of a highly entangled quant…
Abelian and non-Abelian chiral spin liquids in a compact tensor network representation
Hyun-Yong Lee, Ryui Kaneko, Tsuyoshi Okubo +1
We provide new insights into the Abelian and non-Abelian chiral Kitaev spin liquids on the star lattice using the recently proposed loop gas (LG) and string gas (SG) states [H.-Y.…
Magnetic Field Induced Competing Phases in Spin-Orbital Entangled Kitaev Magnets
Li Ern Chern, Ryui Kaneko, Hyun-Yong Lee +1
There has been a great interest in magnetic field induced quantum spin liquids in Kitaev magnets after the discovery of neutron scattering continuum and half quantized thermal Hall…