The spin-excitation continuum, expected to dominate the low-energy fluctuation spectrum in
the Haldane spin chain around the Brillouin zone center, q= 0, is directly observed by …

The magnetic susceptibility of the S= 2 quasi-linear-chain Heisenberg antiferromagnet (2,
2′-bipyridine) trichloromanganese (III) has been measured from 1.8 to 300 K with the …

Combining high-temperature expansions with the recursion method and quantum Monte
Carlo simulations with the maximum entropy method, we study the dynamics of the spin-1/2 …

Using the density matrix renormalization group (DMRG) technique, we carry out a large
scale numerical calculation for the S= 2 antiferromagnetic Heisenberg chain. Performing …

A world-line Monte Carlo approach is proposed to calculate the elementary excitations of
quantum systems. The lowest energies as a function of momentum are successfully …

Thermodynamic properties of S= 2 antiferromagnetic Heisenberg chains are studied not
only under the periodic boundary condition but also under the open one employing a …

In this paper we study an antiferromagnetic Heisenberg S= 2 quantum spin chain at T= 0
with both interaction and on-site anisotropy, H=∑ i 1 2 (S i+ S i+ 1−+ S i− S i+ 1+)+ J z S iz S …

In this paper we study the finite-size scaling for low-energy excitations of S= 1 and S= 2
Heisenberg chains, using the density matrix renormalization-group technique. A crossover …

Neutron-scattering measurements on the one-dimensional gapped S= 1 antiferromagnet,
CsNiCl 3, have shown that excitation corresponding to the Haldane mass gap Δ at low …

The spin dynamics in S= 3/2, one-dimensional (1D) Heisenberg antiferromagnets, CsVCl 3
and CsVBr 3, was investigated using inelastic neutron scattering. The magnetic excitations …