Little strings, long strings, and fuzzballs
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Publication:2292450
DOI10.1007/JHEP11(2019)019zbMATH Open1429.83095arXiv1906.11473WikidataQ126798316 ScholiaQ126798316MaRDI QIDQ2292450
Author name not available (Why is that?)
Publication date: 3 February 2020
Published in: (Search for Journal in Brave)
Abstract: At high energy densities, fivebranes are populated by a Hagedorn phase of so-called "little strings", whose statistical mechanics underlies black fivebrane thermodynamics. A particular limit of this phase yields BTZ black holes in , leading us to the idea that in this context fuzzballs and highly excited little strings are one and the same. We explore these ideas through an analysis of D-brane probes of fivebrane supertube backgrounds. String theory dynamics on these backgrounds is described by an exactly solvable null-gauged WZW model. We develop the formalism of null gauging on worldsheets with boundaries, and find that D-branes wrapping topology at the bottom of the supertube throat are avatars of the "long string" structure that dominates the thermodynamics of the black hole regime, appearing here as excitations of supertubes lying near but slightly outside the black hole regime.
Full work available at URL: https://arxiv.org/abs/1906.11473
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