Bloch walls and macroscopic string states in Bethe's solution of the Heisenberg ferromagnetic linear chain

Authors
Dhar, A Shastry, BS
Citation
A. Dhar et Bs. Shastry, Bloch walls and macroscopic string states in Bethe's solution of the Heisenberg ferromagnetic linear chain, PHYS REV L, 85(13), 2000, pp. 2813-2816
Citations number
28
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
85
Issue
13
Year of publication
2000
Pages
2813 - 2816
Database
ISI
SICI code
0031-9007(20000925)85:13<2813:BWAMSS>2.0.ZU;2-U
Abstract
We present a calculation of the lowest excited states of the Heisenberg fer romagnet in 1D for any wave vector. These turn out to be string solutions o f Bethe's equations with a macroscopic number of particles in them. They ar e identified as generalized quantum Bloch wall states, and a simple physica l picture is provided for the same.