Probing Fuzzballs with Particles, Waves and Strings

Abstract

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.

35 pages. Extended and improved discussions on the integrability of the geodetic equations and on the critical impact parameters

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• Black-hole microstate spectroscopy: ringdown, quasinormal modes, and echoes
• Thermal Decay without Information Loss in Horizonless Microstate Geometries
• Fuzzball Shadows: Emergent Horizons from Microstructure
• The multipolar structure of fuzzballs
• Fuzzballs and Observations
• Superstrata
• Chaos at the rim of black hole and fuzzball shadows
• The dark side of fuzzball geometries
• The Regge limit of AdS${}_3$ holographic correlators
• Turning black-holes and D-branes inside out their photon-spheres
• Light rings of five-dimensional geometries
• Testing the nature of dark compact objects with gravitational waves
• Quasinormal modes of supersymmetric microstate geometries from the D1-D5 CFT
• On the N-pion extension of the Lovelace-Shapiro model
• Eikonal Scattering in Kaluza-Klein Gravity
• Microstate geometries at a generic point in moduli space
• Perturbative higher-derivative terms in N=6 asymmetric orbifolds
• Interior analysis, stretched technique and bubbling geometries
• Hamiltonian Neural Networks approach to fuzzball geodesics