25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 4 150 2009年 [査読有り]
We study the ordered state of the quasi-one dimensional S = 1/2 XXZ spin model in magnetic fields by using quantum Monte Carlo simulations based on the directed-loop algorithm. The H-T phase diagram is illustrated and we find that an incommensurat...
We investigate phase transitions of the quasi-one-dimensional S=1/2 XXZ model in a magnetic field, using bosonization combined with a mean-field treatment of the interchain interaction. We then find that the field-induced incommensurate order is c...
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 76(12) 123707 2007年12月 [査読有り]
We investigate the ordered state in S = 1/2 XXZ spin chains with weak interchain couplings in a magnetic field by using quantum Monte Carlo simulations based on the directed-loop algorithm. The HT phase diagram is illustrated for a square lattice ...
M. Hagiwara   H. Tsujit   C. R. Rotundu   B. Andraka   Y. Takano   T. Suzuki   S. Suga   
MODERN PHYSICS LETTERS B 21(16) 965-976 2007年7月 [査読有り]
We review the results of specific-heat experiments on the S = 1 quasi-one-dimensional (quasi-1D) bond-alternating antiferromagnet Ni(C9H24N4)(NO2)ClO4, alias NTENP. At low temperatures above the transition temperature of a field-induced long-range...
We modify the directed-loop algorithm (DLA) to solve the problem that typically arises from large on-site interaction. The large on-site interaction is inevitable when one tries to simulate a Bose gas system in continuum by discretizing the space ...
A numerical algorithm to calculate exact finite-temperature spectra of<br />
many-body lattice Hamiltonians is formulated by combining the typicality<br />
approach and the shifted Krylov subspace method. The combined algorithm, which<br />
we nam...
Takafumi Suzuki   Masahiro Sato   
2015年5月
We study the boundary nature of trapped bosonic Mott insulators in optical<br />
square lattices, by performing quantum Monte Carlo simulation. We show that a<br />
finite superfluid density generally emerges in the incommensurate-filling (IC)<br ...