Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1999-07-19
Physics
Condensed Matter
Strongly Correlated Electrons
11 pages, RevTex, 2 postscript figures, typos & references corrected
Scientific paper
10.1088/0305-4470/32/45/301
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.
Affleck Ian
Qin Shaojin
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