680 citations · 3.5k across the 91 of their papers we have counts for
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Order Parameter to Characterize Valence-Bond-Solid States in Quantum Spin Chains
Masaaki Nakamura, Synge Todo
We propose an order parameter to characterize valence-bond-solid (VBS) states in quantum spin chains, given by the ground-state expectation value of a unitary operator appearing in…
Finite-Temperature Phase Diagram of Hard-Core Bosons in Two Dimensions
Guido Schmid, Synge Todo, Matthias Troyer +1
We determine the finite-temperature phase diagram of the square lattice hard-core boson Hubbard model with nearest neighbor repulsion using quantum Monte Carlo simulations. This mo…
Bond-Dilution Effects on Two-Dimensional Spin-Gapped Heisenberg Antiferromagnets
Chitoshi Yasuda, Synge Todo, Munehisa Matsumoto +1
Bond-dilution effects on spin-1/2 spin-gapped Heisenberg antiferromagnets of coupled alternating chains on a square lattice are investigated by means of the quantum Monte Carlo met…
Ground-State Phase Diagram of Quantum Heisenberg Antiferromagnets on the Anisotropic Dimerized Square Lattice
Munehisa Matsumoto, Chitoshi Yasuda, Synge Todo +1
The S=1/2 and S=1 two-dimensional quantum Heisenberg antiferromagnets on the anisotropic dimerized square lattice are investigated by the quantum Monte Carlo method. By finite-size…
Real-Space Renormalization Group Study of Effects of Anisotropy on S=1 Random Antiferromagnetic Chain
Shigeru Koikegami, Synge Todo, Hajime Takayama
We investigate S=1 antiferromagnetic quantum spin chain, whose exchange couplings are strongly disordered. By the real-space renomalization group method, introduced by Ma, Dasgupta…
Plaquette-singlet solid state and topological hidden order in spin-1 antiferromagnetic Heisenberg ladder
Synge Todo, Munehisa Matsumoto, Chitoshi Yasuda +1
Ground-state properties of the spin-1 two-leg antiferromagnetic ladder are investigated precisely by means of the quantum Monte Carlo method. It is found that the correlation lengt…