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ID: 346839.0, MPI für Gravitationsphysik / Quantum Gravity and Unified Theories
The ernst equation on a riemann surface
Authors:Korotkin, D. A.; Nicolai, Hermann
Date of Publication (YYYY-MM-DD):1994-10
Title of Journal:Nuclear Physics B
Journal Abbrev.:Nucl. Phys. B
Volume:429
Issue / Number:1
Start Page:229
End Page:254
Review Status:not specified
Audience:Not Specified
Abstract / Description:The Ernst equation is formulated on an arbitrary Riemann surface. Analytically, the problem reduces to finding solutions of the ordinary Ernst equation which are periodic along the symmetry axis. The family of (punctured) Riemann surfaces admitting a non-trivial Ernst field constitutes a “partially discretized” subspace of the usual moduli space. The method allows us to construct new exact solutions of Einstein's equations in vacuo with non-trivial topology, such that different “universes”, each of which may have several black holes on its symmetry axis, are connected through necks bounded by cosmic strings. We show how the extra topological degrees of freedom may lead to an extension of the Geroch group and discuss possible applications to string theory.
External Publication Status:published
Document Type:Article
Communicated by:Hermann Nicolai
Affiliations:MPI für Gravitationsphysik/Quantum Gravity and Unified Theories
External Affiliations:Institute for Theoretical Physics, Hamburg University, Luruper Chaussee 149, Hamburg 22761, Germany
Identifiers:ISSN:0550-3213
DOI:10.1016/S0550-3213(94)80048-0
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