680 citations · 3.5k across the 91 of their papers we have counts for
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The ALPS project release 3.0: open source software for strongly correlated systems
F. Alet, T. Chen, A. Feiguin +16
We present release 3.0 of the ALPS (Algorithms and Libraries for Physics Simulations) project, an open-source software project to develop libraries and application programs for the…
Local Basis Transformation to Mitigate Negative Sign Problems
Keisuke Murota, Synge Todo
Quantum Monte Carlo (QMC) methods for the frustrated quantum spin systems occasionally suffer from the negative sign problem, which makes simulations exponentially harder for large…
Update of : Newly added functions and methods in versions 2 and 3
Kota Ido, Mitsuaki Kawamura, Yuichi Motoyama +5
[-] is an open-source software package of numerically exact and stochastic calculations for a wide range of quantum many-body systems. In this paper, we…
Fast-update in self-learning algorithm for continuous-time quantum Monte Carlo
Ruixiao Cao, Synge Todo
We propose a novel technique for speeding up the self-learning Monte Carlo method applied to the single-site impurity model. For the case where the effective Hamiltonian is express…
Parallel loop cluster quantum Monte Carlo simulation of quantum magnets based on global union-find graph algorithm
Synge Todo, Haruhiko Matsuo, Hideyuki Shitara
A large-scale parallel loop cluster quantum Monte Carlo simulation is presented. On 24,576 nodes of the K computer, one loop cluster Monte Carlo update of the world-line configurat…
Magnetization process of the S = 1/2 two-leg organic spin-ladder compound BIP-BNO
Kazuya Nomura, Yasuhiro H. Matsuda, Yasuo Narumi +7
We have measured the magnetization of the organic compound BIP-BNO (3,5'-bis(N-tert-butylaminoxyl)-3',5-dibromobiphenyl) up to 76 T where the magnetization is saturated. The S = 1/…
Quantum Lattice Model Solver
Mitsuaki Kawamura, Kazuyoshi Yoshimi, Takahiro Misawa +3
[-] is a program package based on the Lanczos-type eigenvalue solution applicable to a broad range of quantum lattice models, i.e., arbitrary quantum la…
Z_N Berry phase and symmetry protected topological phases of SU(N) antiferromagnetic Heisenberg chain
Yuichi Motoyama, Synge Todo
The local Z_N quantized Berry phase for the SU(N) antiferromagnetic Heisenberg spin model is formulated. This quantity, which is a generalization of the local Z_2 Berry phase for S…
Temperature-Dependence of Magnetically-Active Charge Excitations in Magnetite across the Verwey Transition
M. Taguchi, A. Chainani, S. Ueda +16
We have studied the electronic structure of bulk single crystals and epitaxial films of magnetite FeO. Fe core-level spectra show clear differences between hard x-ray…
Path-integral Monte Carlo for the Gauge-fixed Berry Connection and the Local Z_2 Berry Phase
Yuichi Motoyama, Synge Todo
We present a general formula of the gauge-fixed Berry connection which can be evaluated by path- integral Monte Carlo method. We also propose that the gauge-fixed local Berry conne…
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…
Long-Range Order of the Three-Sublattice Structure in the S = 1 Heisenberg Antiferromagnet on a Spatially Anisotropic Triangular Lattice
Hiroki Nakano, Synge Todo, Toru Sakai
We study the S=1 Heisenberg antiferromagnet on a spatially anisotropic triangular lattice by the numerical diagonalization method. We examine the stability of the long-range order…
Path-integral Monte Carlo method for the local Z_2 Berry phase
Yuichi Motoyama, Synge Todo
We present a loop cluster algorithm Monte Carlo method for calculating the local Z_2 Berry phase of the quantum spin models. The Berry connection, which is given as the inner produ…
Ordering and Excitation in Orbital Compass Model on a Checkerboard Lattice
Joji Nasu, Synge Todo, Sumio Ishihara
We study an orbital compass model on a checkerboard lattice where orbital degree of freedom is represented by the pseudo-spin operator. Competition arises from an Ising interaction…
The ALPS project release 2.0: Open source software for strongly correlated systems
B. Bauer, L. D. Carr, H. G. Evertz +29
We present release 2.0 of the ALPS (Algorithms and Libraries for Physics Simulations) project, an open source software project to develop libraries and application programs for the…
Orbital ordering in e_g orbital systems: Ground states and thermodynamics of the 120 degree model
Andre van Rynbach, Synge Todo, Simon Trebst
Orbital degrees of freedom shape many of the properties of a wide class of Mott insulating, transition metal oxides with partially filled 3d-shells. Here we study orbital ordering…
Improved chain mean-field theory for quasi-one-dimensional quantum magnets
Synge Todo, Akira Shibasaki
A novel mean-field approximation for quasi-one-dimensional (Q1D) quantum magnets is formulated. Our new mean-field approach is based on the Bethe-type effective-field theory, where…
Green's function theory for spin-1/2 ferromagnets with an easy-plane exchange anisotropy
Daisuke Yamamoto, Synge Todo, Susumu Kurihara
The many-body Green's function theory with the random-phase approximation is applied to the study of easy-plane spin-1/2 ferromagnets in an in-plane magnetic field. We demonstrate…
Parity law of the singlet-triplet gap in graphitic ribbons
Mohamad Al Hajj, Fabien Alet, Sylvain Capponi +3
This work explores the possibility to transfer the parity law of the singlet-triplet gap established for square ladders (gapped for even number of legs, gapless for odd number of l…
Quantum phase transitions of spin chiral nanotubes
Munehisa Matsumoto, Toru Sakai, Masahiro Sato +2
Recently many interesting magnetic nanostructures have been fabricated and much attention is arising on the rich magnetic properties that originate in the quantum effects eminent i…
The ALPS project: open source software for strongly correlated systems
F. Alet, P. Dayal, A. Grzesik +15
We present the ALPS (Algorithms and Libraries for Physics Simulations) project, an international open source software project to develop libraries and application programs for the…
Neel Temperature of Quasi-Low-Dimensional Heisenberg Antiferromagnets
C. Yasuda, S. Todo, K. Hukushima +4
The Néel temperature, , of quasi-one- and quasi-two-dimensional antiferromagnetic Heisenberg models on a cubic lattice is calculated by Monte Carlo simulations as a func…
Quantum Phase Transitions of Quasi-One-Dimensional Heisenberg Antiferromagnets
Munehisa Matsumoto, Synge Todo, Chitoshi Yasuda +1
We study the ground-state phase transitions of quasi-one-dimensional quantum Heisenberg antiferromagnets by the quantum Monte Carlo method with the continuous-time loop algorithm a…
Ground state of antiferromagnetic Heisenberg two-leg ladder in terms of the valence-bond solid picture
Munehisa Matsumoto, Synge Todo, Masaaki Nakamura +2
We have proposed the plaquette-singlet solid (PSS) ground state for the spin-1 antiferromagnetic Heisenberg two-leg ladder. Based on the PSS picture, we discuss the correspondence…