PP-Wave Strings from Membrane and from String in the Spacetime with Two Time Directions

Abstract

In this paper we obtain strings that propagate in the quantized pp-wave backgrounds. We can obtain these strings from the solutions of membrane. The other way is the propagation of a massless string in a spacetime with two time dimensions. This string sweeps a worldvolume, which enables us to obtain other strings in the quantized pp-wave backgrounds in the spacetime with one time direction. The associated algebras and Hamiltonians of these massive strings will be studied.

12 pages, Latex, no figure, to appear in Phys. Lett. B

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• Quantization of Neveu-Schwarz-Ramond Superstring Model in 10+2-dimensional Spacetime