197 research outputs found
Full action of two deformation operators in the D1D5 CFT
We are interested in thermalization in the D1D5 CFT, since this process is
expected to be dual to black hole formation. We expect that the lowest order
process where thermalization occurs will be at second order in the perturbation
that moves us away from the orbifold point. The operator governing the
deformation off of the orbifold point consists of a twist operator combined
with a supercharge operator acting on this twist. In a previous paper we
computed the action of two twist operators on an arbitrary state of the CFT. In
the present work we compute the action of the supercharges on these twist
operators, thereby obtaining the full action of two deformation operators on an
arbitrary state of the CFT. We show that the full amplitude can be related to
the amplitude with just the twists through an action of the supercharge
operators on the initial and final states. The essential part of this
computation consists of moving the contours from the twist operators to the
initial and final states; to do this one must first map the amplitude to a
covering space where the twists are removed, and then map back to the original
space on which the CFT is defined.Comment: 48 pages, 2 figure
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