Fractional and Integer Excitations in Quantum Antiferromagnetic Spin 1/2 Ladders

Preprint

28 September 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0106077

Abstract

Spectral densities are computed in unprecedented detail for quantum antiferromagnetic spin 1/2 two-leg ladders. These results were obtained due to a major methodical advance achieved by optimally chosen unitary transformations. The approach is based on dressed integer excitations. Considerable weight is found at high energies in the two-particle sector. Precursors of fractional spinon physics occur implying that there is no necessity to resort to fractional excitations in order to describe features at higher energies.

Keywords

QUANTUM ANTIFERROMAGNETIC SPIN
UNPRECEDENTED DETAIL
INTEGER EXCITATIONS
SPECTRAL DENSITIES
LADDERS SPECTRAL
PARTICLE

All Related Versions

Version 1, 2001-06-05, ArXiv
Version 2, 2001-09-28, ArXiv
Published version: Physical Review Letters, 87 (16), 167204.

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