Bloch Walls and Macroscopic String States in Bethe's Solution of the Heisenberg Ferromagnetic Linear Chain

2000/05/24 by Abhishek Dhar, B. Sriram Shastry, B Sriram Shastry · 3 citations
Physics and Astronomy · #Nonlinear Photonic Systems #Physics of Superconductivity and Magnetism #Quantum optics and atomic interactions #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.85.2813

4 pages, RevTex, 2 figures, Submitted to Phys. Rev. Lett

arxiv created 2000/05/24 · openalex publication_date 2000/09/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present a calculation of the lowest excited states of the Heisenberg ferromagnet in 1D for any wave vector. These turn out to be string solutions of Bethe's equations with a macroscopic number of particles in them. They are identified as generalized quantum Bloch wall states, and a simple physical picture is provided for the same.

Citations

• Two soluble models of an antiferromagnetic chain

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