Quantum spin chains in a magnetic field
| dc.creator | Kashurnikov, V. A. | |
| dc.creator | Prokof'ev, N. V. | |
| dc.creator | Svistunov, B. V. | |
| dc.creator | Troyer, M. | |
| dc.date | 1998-02-27 | |
| dc.date | 1998-07-28 | |
| dc.date.accessioned | 2026-07-07T06:29:19Z | |
| dc.date.available | 2026-07-07T06:29:19Z | |
| dc.description | We demonstrate that the ``worm'' algorithm allows very effective and precise quantum Monte Carlo (QMC) simulations of spin systems in a magnetic field, and its auto-correlation time is rather insensitive to the value of H at low temperature. Magnetization curves for the $s=1/2$ and $s=1$ chains are presented and compared with existing Bethe ansatz and exact diagonalization results. From the Green function analysis we deduce the magnon spectra in the s=1 system, and directly establish the "relativistic" form E(p)=(Δ^2 +v^2 p^2)^{1/2} of the dispersion law. | |
| dc.description | 6 pages, 8 figures; removed discussion of spin-2 case - will be published later in a separate paper | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9802294 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9802294 | |
| dc.identifier | Phys. Rev. B 59, 001162 (1999) | |
| dc.identifier | doi:10.1103/PhysRevB.59.1162 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/97989 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Statistical Mechanics | |
| dc.title | Quantum spin chains in a magnetic field | |
| dc.type | text |