Topology changing processes and symmetries of string effective action

Abstract

Wormhole solutions corresponding to space-time geometries $R^1\times S^1\times S^2$ and $R^1\times S^3$ are obtained from reduced string effective action and the action is written in a manifestly $O(d,d)$ invariant form. A general treatment is given for obtaining wormhole solutions of different topologies from dimensional reduction. For specific ansatz of internal metric and antisymmetric field the reduced action is shown to have a global $SL(2,C)$ symmetry. The $SL(2,C)$ and duality symmetries have been exploited to generate new configurations of internal fields which produce wormhole solutions in four space-time dimensions. The $SL(2,C)$ symmetry discussed in this paper arises due to specific form of the moduli and these transformations belong to a subgroup of $O(d,d)$ global symmetry.

23 pages, IP/BBSR/93-8

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• S-duality and Compactification of type IIB Superstring Action
• Equations of Motion in Double Field Theory: From Particles to Scale Factors
• Four Dimensional String-String Solutions and Symmetries of String Effective Action
• Some Problems of Topology Change Description in the Theory of Space-Time
• Symmetries of Four-dimensional String Effective Action with Cosmological Constant
• Magnetic Wormholes and Vertex Operators