Penrose limits of I-branes, twist-compactified D5-branes and spin chains
Abstract
In this paper we consider the Penrose limit in the case of two gravity duals. One of them, consists of compactified I-branes (intersecting sets of D5-branes over (1+1) dimensions). The second consists of D5-branes compactified on a circle. Both compactifications preserve SUSY. We find a match of the oscillators and masses of string modes on the resulting pp wave against a spin chain in a (2+1)-dimensional field theory in the first case, and a spin chain in a (1+1)-dimensional field theory in the second.
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