99 research outputs found
Giant Holes
We study the semiclassical spectrum of excitations around a long spinning
string in AdS_3. In addition to the usual small fluctuations, we find the
spectrum contains a branch of solitonic excitations of finite energy. We
determine the dispersion relation for these excitations. This has a
relativistic form at low energies but also matches the dispersion relation for
the "hole" of the dual gauge theory spin chain at high energies. The low-energy
behaviour is consistent with the hypothesis that the solitonic excitations
studied here are continuously related to the elementary excitations of the
string.Comment: 17 pages, 1 figure; additional references include
Mirror Symmetry and Toric Geometry in Three-Dimensional Gauge Theories
We study three dimensional gauge theories with N=2 supersymmetry. We show
that the Coulomb branches of such theories may be rendered compact by the
dynamical generation of Chern-Simons terms and present a new class of mirror
symmetric theories in which both Coulomb and Higgs branches have a natural
description in terms of toric geometry.Comment: 16 pages. LaTeX file+two figures. Final version to appear in JHE
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