Chiral eigenbases of the XX and XY quantum spin chains
Abstract
We calculate the values of observables in chiral eigenstates of the XX quantum spin chain that were introduced in previous work and compare the form of the result with the respective expressions obtained in the more familiar eigenbasis of states with fixed magnetization in the direction. We carry out the diagonalization of the XY spin chain in the chiral basis. We calculate the norm of the chiral XY eigenstates, and the values of the one-point functions and some neighbor two-point correlation functions. We interpret the spectrum and the particle content of the XY chain in terms of scattering states of an even number of kink and antikink excitations that are created over a reduced Brillouin zone.
Cite
@article{arxiv.2411.17877,
title = {Chiral eigenbases of the XX and XY quantum spin chains},
author = {Xin Zhang and Frank Göhmann and Andreas Klümper and Vladislav Popkov},
journal= {arXiv preprint arXiv:2411.17877},
year = {2025}
}
Comments
21 pages, 3 figures, v2: published version, typos corrected, presentation improved