Logarithmic Corrections in Quantum Impurity Problems
Strongly Correlated Electrons
2016-08-31 v2
Abstract
The effect of a BULK marginal operator on BOUNDARY critical phenomena in two space-time dimensions is considered. The particular case of an open S=1/2 antiferromagnetic Heisenberg chain, corresponding to a Wess-Zumino-Witten non-linear sigma model, is solved. In this case, the needed renormalization group coefficient is associated with a novel operator product expansion in which THREE operators approach the same point. Resulting logarithmic corrections occurring in finite size calculations and nuclear magnetic resonance experiments are discussed.
Keywords
Cite
@article{arxiv.cond-mat/9907284,
title = {Logarithmic Corrections in Quantum Impurity Problems},
author = {Ian Affleck and Shaojin Qin},
journal= {arXiv preprint arXiv:cond-mat/9907284},
year = {2016}
}
Comments
11 pages, RevTex, 2 postscript figures, typos & references corrected