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Probing Fuzzballs with Particles, Waves and Strings
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We probe D1D5 micro-state geometries with massless particles, waves and strings. To this end, we study geodetic motion, Klein-Gordon equation and string scattering in the resulting gravitational background. Due to the reduced rotational symmetry, even in the simple case of a circular fuzzball, the system cannot be integrated elementarily. Yet, for motion in the plane of the string profile or in the orthogonal plane to it, one can compute the deflection angle or the phase shift and identify the critical impact parameter, at which even a massless probe is captured by the fuzzball if its internal momentum is properly tuned. We find agreement among the three approaches, thus giving further support to the fuzzball proposal at the dynamical level.
Forward citations
Cited by 3 Pith papers
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Wave chaos in BPS microstate geometries strengthens toward black-hole-like throats while geodesic chaos weakens, and weak-coupling CFT Renyi entropies do not share that bulk hierarchy.
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Cogito, ergo - strings: Supersymmetric ergoregions and their stringy excitations
Supersymmetric ergoregions without horizons in NS5-F1-P bound states are shown to admit negative-energy BPS excitations, described via gauged WZW models and mapped holographically to the dual CFT.
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Scalar waves in a Topological Star spacetime: self-force and radiative losses
A scalar charge on a circular orbit around a topological star radiates energy at a rate given by a new post-Newtonian formula, with the self-force purely radial and constant at leading order.
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