105 citations · 254 across the 20 of their papers we have counts for
21 papers
Tensor-network Monte Carlo approach based on time-evolving block decimation
Shimpei Goto, Hidemaro Suwa, Synge Todo
We propose a tensor-network Monte Carlo (TNMC) approach for unitary evolution following the compression sequence of the time-evolving block decimation (TEBD) algorithm. In the TNMC…
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…
Matrix-product-state approach for qubits-waveguide systems in real space
Shimpei Goto
We present a matrix-product-state-based numerical approach for simulating systems composed of several qubits and a common one-dimensional waveguide. In the presented approach, the…
Observation of slow relaxation due to Hilbert space fragmentation in strongly interacting Bose-Hubbard chains
Kantaro Honda, Yosuke Takasu, Shimpei Goto +4
While isolated quantum systems generally thermalize after long-time evolution, there are several exceptions defying thermalization. A notable mechanism of such nonergodicity is the…
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…
Labeling eigenstates of qubit-cavity systems based on the continuity of qubit occupancy: Detecting resonances to higher excited qubit states
Shimpei Goto, Kazuki Koshino
We propose a new method for labeling the eigenstates of qubit-cavity systems based on the continuity of the qubit occupancy. The labeled eigenstates give a rough estimate of the ev…
Efficient numerical approach for the simulations of high-power dispersive readout with time-dependent unitary transformation
Shimpei Goto, Kazuki Koshino
We develop an efficient numerical approach for simulating the high-power dispersive readout in circuit quantum electrodynamics. In the numerical simulations of the high-power reado…
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…
Transition between vacuum and finite-density states in the infinite-dimensional Bose-Hubbard model with spatially inhomogeneous dissipation
Shiono Asai, Shimpei Goto, Ippei Danshita
We analyze dynamics of the infinite-dimensional Bose-Hubbard model with spatially inhomogeneous dissipation in the hardcore boson limit by solving the Lindblad master equation with…
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…
Performance evaluation of the discrete truncated Wigner approximation for quench dynamics of quantum spin systems with long-range interactions
Masaya Kunimi, Kazuma Nagao, Shimpei Goto +1
The discrete truncated Wigner approximation (DTWA) is a powerful tool for analyzing dynamics of quantum spin systems. Since the DTWA includes the leading-order quantum corrections…
Minimally entangled typical thermal states algorithm with Trotter gates
Shimpei Goto, Ippei Danshita
We improve the efficiency of the minimally entangled typical thermal states (METTS) algorithm without breaking the Abelian symmetries. By adding the operation of Trotter gates that…
Energy redistribution and spatio-temporal evolution of correlations after a sudden quench of the Bose-Hubbard model
Yosuke Takasu, Tomoya Yagami, Hiroto Asaka +5
An optical-lattice quantum simulator is an ideal experimental platform to investigate non-equilibrium dynamics of a quantum many-body system, which is in general hard to simulate w…
Measurement-induced transitions of the entanglement scaling law in ultracold gases with controllable dissipation
Shimpei Goto, Ippei Danshita
Recent studies of quantum circuit models have theoretically shown that frequent measurements induce a transition in a quantum many-body system, which is characterized by the change…
Quasiexact Kondo Dynamics of Fermionic Alkaline-Earth-Like Atoms at Finite Temperatures
Shimpei Goto, Ippei Danshita
A recent experiment has observed the antiferromagnetic interaction between the ground state and the metastable state of Yb atoms, which are fermionic. This…
Performance of the time-dependent variational principle for matrix product states in long-time evolution of a pure state
Shimpei Goto, Ippei Danshita
The projection of time-dependent variational principle (TDVP) for matrix product states enables us to perform long-time simulations of one-dimensional quantum systems with the cons…
Cooling schemes for two-component fermions in layered optical lattices
Shimpei Goto, Ippei Danshita
Recently, a cooling scheme for ultracold atoms in a bilayer optical lattice has been proposed [A. Kantian et al., arXiv:1609.03579]. In their scheme, the energy offset between the…
Incommensurate spiral magnetic order on anisotropic triangular lattice: Dynamical mean field study in a spin-rotating frame
Shimpei Goto, Susumu Kurihara, Daisuke Yamamoto
We study the ground-state magnetism of the half-filled Hubbard model on the anisotropic triangular lattice, where two out of three bonds have hopping and the third one has $t^\…
A Phenomenological Theory of Loop-Current Phases
Shimpei Goto, Susumu Kurihara
A phenomenological theory of the loop-current and loop-spin-current phases is proposed. In order to investigate the stability of these phases, a Ginzburg-Landau-Wilson type action…
Spontaneous loop-spin current with topological characters in the Hubbard model
Shimpei Goto, Keisuke Masuda, Susumu Kurihara
We find a state characterized by a spontaneous loop-spin current and a single-particle gap in the Hubbard model within the variational cluster approach. This state exists for arbit…