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Gibbons-Hawking entropy and BMN strings

Min-xin Huang*

  • *Contact author: minxin@ustc.edu.cn
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Phys. Rev. D 113, 106031 – Published 28 May, 2026

DOI: https://doi.org/10.1103/l55s-g5zk

Abstract

We provide some up-to-date discussions related to cosmological event horizon and entropy of our Universe, then introduce an intriguing idea that there may be a universal finite upper bound for entropy accessible to an observer in consistent theories of quantum gravity. We argue that the Berenstein-Maldacena-Nastase (BMN) strings provide a test of the idea. More speculatively, in an optimistic scenario, this also provides a possible estimate of the cosmological constant.

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Phys. Rev. D 113, 106031– Published 28 May, 2026
  • Received 2 December 2025
  • Accepted 14 May 2026
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