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Einstein-Maxwell gravitational instantons and five dimensional solitonic strings

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arxiv hep-th/0610261 v1 pith:AV57ABNY submitted 2006-10-24 hep-th gr-qc

classification hep-thgr-qc
keywords dimensionaleinstein-maxwellgravitationalinstantonssolitonicsolutionsstringssupergravity
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We study various aspects of four dimensional Einstein-Maxwell multicentred gravitational instantons. These are half-BPS Riemannian backgrounds of minimal N=2 supergravity, asymptotic to R^4, R^3 x S^1 or AdS_2 x S^2. Unlike for the Gibbons-Hawking solutions, the topology is not restricted by boundary conditions. We discuss the classical metric on the instanton moduli space. One class of these solutions may be lifted to causal and regular multi `solitonic strings', without horizons, of 4+1 dimensional N=2 supergravity, carrying null momentum.

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  1. Multicentered black hole saddles for supersymmetric indices

    hep-th 2025-07 conditional novelty 7.0 of 10

    Multi-center black hole saddles for the supersymmetric index exist at finite temperature, their on-shell action is the sum of extremal entropies, and the entire moduli space of saddles vanishes at walls of marginal stability.

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