Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1864257 | Physics Letters A | 2009 | 4 Pages |
Abstract
The entanglement perturbation theory is developed to calculate the excitation spectrum in one dimension. Applied to the spin-12 antiferromagnetic Heisenberg model, it reproduces the des Cloiseaux–Pearson Bethe ansatz result. As for spin-1, the spin-triplet magnon spectrum has been determined for the first time for the entire Brillouin zone, including the Haldane gap at k=πk=π.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Sung Gong Chung, Lihua Wang,