Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2002-10-08
JHEP 0301 (2003) 064
Physics
High Energy Physics
High Energy Physics - Theory
latex, 22 pages, minor corrections, references added, published version
Scientific paper
10.1088/1126-6708/2003/01/064
We obtain the Penrose limit of six dimensional Non-Commutative Open String (NCOS$_6$) theory and show that in the neighborhood of a particular null geodesic it leads to an exactly solvable string theory (unlike their counterparts in four or in other dimensions). We describe the phase structure of this theory and discuss the Penrose limit in different phases including Open D-string (OD1) theory. We compute the string spectrum and discuss their relations with the states of various theories at different phases. We also consider the case of general null geodesic for which the Penrose limit leads to string theory in the time dependent pp-wave background and comment on the renormalization group flow in the dual theory.
Bhattacharya Somdatta
Roy Subinit
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