On the particle excitations in the XXZ- spin chain

Abstract

We continue to study the excited states for the XXZ- spin chain corresponding to the complex roots of the Bethe Ansatz equations with the imaginary part equal to $\pi /2$. We propose the particle-hole symmetry which relates the eigenstates build up from the two different pseudovacuum states. We find the XXX- spin chain limit for the eigenstates with the complex roots. We also comment on the low-energy excited states for the XXZ- spin chain.

8 pages, short remark is added

Cited by in corpus (3)

• Effective S=1/2 description of the S=1 chain with strong easy plane anisotropy
• Dressed excitations, thermodynamics and relaxation in the 1D XXZ Heisenberg model
• The interaction energy of the particle-hole pair in the XXZ-spin chain