English

Three Impossible Theories

High Energy Physics - Theory 2021-07-27 v1 General Relativity and Quantum Cosmology

Abstract

I will begin by conjecturing a cosmological generalization of black hole complementarity (also known as the central dogma). I will then discuss three theories and argue that they are inconsistent with second law of thermodynamics if the cosmological version of the dogma is correct. The three theories are: the big rip; cyclic cosmology; and the Farhi-Guth-Guven mechanism for creating inflating universes behind black hole horizons.

Keywords

Cite

@article{arxiv.2107.11688,
  title  = {Three Impossible Theories},
  author = {Leonard Susskind},
  journal= {arXiv preprint arXiv:2107.11688},
  year   = {2021}
}

Comments

12 pages, 4 figures

R2 v1 2026-06-24T04:29:32.442Z