More on Penrose limits and non-local theories

Abstract

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.

arXiv commentlatex, 22 pages, minor corrections, references added, published version

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Cited by in corpus (6)

• Twisted Backgrounds, PP-Waves and Nonlocal Field Theories
• A Soluble String Theory of Hadrons
• String theory and the Classical Stability of Plane Waves
• Semiclassical Strings Probing NS5 Brane Wrapped on S^5
• On Penrose limit of elliptic branes
• Penrose Limit and Enhancon Geometry