Aganagic, M Gopakumar, R Minwalla, S Strominger, A Unstable Solitons in Noncommutative Gauge Theory JHEP 018 04 We find a class of exact solutions of noncommutative gauge theories corresponding to unstable non-BPS solitons. In the two-dimensional euclidean (or 2+1 dimensional lorentzian) U(1) theory we find localized solutions carrying nonzero magnetic flux. In four euclidean dimensions we find non-BPS solutions with the same Pontrjagin charge but greater energy than the usual self-dual Yang-Mills instanton. We conjecture that these solutions and generalizations thereof correspond to nonsupersymmetric configurations of D-(p-2k) branes (or intersections thereof) in a D-p brane in the noncommutative scaling limit of large B-field. In the particular case of a 0-brane on a 2-brane the analysis of small fluctuations reveals an infinite tower of states which agrees exactly with that of the 0-2 CFT in the scaling limit. The spectrum contains a tachyon, and we show explicitly that the endpoint of tachyon condensation corresponds to the 0-brane dissolved in the 2-brane. eng 2001

http://documents.cern.ch/cgi-bin/setlink?base=preprint&categ=hep-th&id=0009142; http://cds.cern.ch/record/460727/files/0009142.pdf; http://cds.cern.ch/record/460727/files/0009142.ps.gz;

Imported from Invenio.