509 research outputs found
q-deformed su(2|2) boundary S-matrices via the ZF algebra
Beisert and Koroteev have recently found a bulk S-matrix corresponding to a
q-deformation of the centrally-extended su(2|2) algebra of AdS/CFT. We
formulate the associated Zamolodchikov-Faddeev algebra, using which we derive
factorizable boundary S-matrices that generalize those of Hofman and Maldacena.Comment: 15 pages; v2: correct misplaced equation labe
Wrapping corrections for non-diagonal boundaries in AdS/CFT
We consider an open string stretched between a Y=0 brane and a Y_theta=0
brane. The latter brane is rotated with respect to the former by an angle
theta, and is described by a non-diagonal boundary S-matrix. This system
interpolates smoothly between the Y-Y (theta =0) and the Y-bar Y (theta = pi/2)
systems, which are described by diagonal boundary S-matrices. We use
integrability to compute the energies of one-particle states at weak coupling
up to leading wrapping order (4, 6 loops) as a function of the angle. The
results for the diagonal cases exactly match with those obtained previously.Comment: 21 pages, 1 figur
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