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Comment on ``Stripes and the t-J Model''
This is a comment being submitted to Physical Review Letters on a recent
letter by Hellberg and Manousakis on stripes in the t-J model.Comment: One reference correcte
Checkerboard patterns in the t-J model
Using the density matrix renormalization group, we study the possibility of
real space checkerboard patterns arising as the ground states of the t-J model.
We find that checkerboards with a commensurate (pi,pi) background are not low
energy states and can only be stabilized with large external potentials.
However, we find that striped states with charge density waves along the
stripes can form approximate checkerboard patterns. These states can be
stabilized with a very weak external field aligning and pinning the CDWs on
different stripes.Comment: 4 pages, 5 figure
The Triangle Anomaly in the Triple-Regge Limit
The U(1) triangle anomaly is present, as an infra-red divergence, in the
six-reggeon triple-regge interaction vertex obtained from a maximally
non-planar Feynman diagram in the full triple-regge limit of three-to-three
quark scattering.Comment: 7 pages, with 5 PS figures in the text. Talk presented at the XXIX
International Symposium on Multiparticle Dynamics ``QCD & Multiparticle
Production'', Brown University, Providence, August 9-13, 199
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