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Horizon strings as 3D black hole microstates

Arjun Bagchi, Daniel Grumiller, Mohammad Mehdi Sheikh-Jabbari

SciPost Phys. 15, 210 (2023) · published 27 November 2023


We propose that 3d black holes are an ensemble of tensionless null string states. These microstates typically have non-zero winding. We evaluate their partition function in the limit of large excitation numbers and show that their combinatorics reproduces the Bekenstein-Hawking entropy and its semiclassical logarithmic corrections.

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