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Dynamics in One-Dimensional Spin Systems - Density-Matrix Renormalization Group Study
- Source :
- International Journal of Modern Physics B, Volume 21, Issue 13-14, pp. 2262-2272 (2007)
- Publication Year :
- 2007
-
Abstract
- We study the one-dimensional $S=1/2$ Heisenberg model with a uniform and a staggered magnetic fields, using the dynamical density-matrix renormalization group (DDMRG) technique. The DDMRG enables us to investigate the dynamical properties of chain with lengths up to a few hundreds, and the results are numerically exact in the same sense as 'exact diagonalization' results are. Thus, we can analyze the low-energy spectrum almost in the thermodynamic limit. In this work, we calculate the dynamical spin structure factor and demonstrate the performance of the DDMRG method applying the open-end boundary condition as well as the periodic boundary condition.<br />Comment: 11 pages, 6 figures
- Subjects :
- Condensed Matter - Strongly Correlated Electrons
Subjects
Details
- Database :
- arXiv
- Journal :
- International Journal of Modern Physics B, Volume 21, Issue 13-14, pp. 2262-2272 (2007)
- Publication Type :
- Report
- Accession number :
- edsarx.0710.3506
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1142/S0217979207043646