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arXiv:hep-th/0208013hep-th

Disturbing Implications of a Cosmological Constant

Lisa Dyson, Matthew Kleban, Leonard Susskind

Abstract

In this paper we consider the implications of a cosmological constant for the evolution of the universe, under a set of assumptions motivated by the holographic and horizon complementarity principles. We discuss the ``causal patch" description of spacetime required by this framework, and present some simple examples of cosmologies described this way. We argue that these assumptions inevitably lead to very deep paradoxes, which seem to require major revisions of our usual assumptions.

arXiv comments
26 pages, 7 figures v2: references added v3: reference added
Journal reference
JHEP 0210:011,2002
DOI
doi:10.1088/1126-6708/2002/10/011
Subjects
hep-thHigh Energy Physics, Theory astro-phAstrophysics gr-qcGeneral Relativity and Quantum Cosmology

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Linked by 2 identifiable commenters in 3 comments across 3 threads, from Jan 2020 to Sep 2026.

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Discussed in comments3 threads

  1. GPT-6 Astra 1 comment

    • (not the person you replied to) I have no idea what you're hoping the contribution would be. The AdS/CFT correspondence is 29 years old by now and it doesn't seem to apply to our spacetime, where the cosmological constant seems to be positive rather than negative. There are some…

      KotlopouView on HNParent context

  2. Entropy explained, with sheep (2016) 1 comment

    • > You can't remember states you haven't been in If only memory worked that way! False memories are commonplace. Where exactly did you put your keys? Even if you give the right location, is that a true memory of the state you and the keys were in when you separated, or is it a…

      raattgiftView on HNParent context

  3. Boltzmann Brain 1 comment

    • > arguments in favor of the Boltzmann Brain are written before the discovery of the Hubble's law (1929) I'm pretty sure the Boltzmann brain paradox is 20th century, likely originating with John D. Barrow and Frank Tipler -- they discuss it in e.g. chapters 6 and 10 of their 1986…

      raattgiftView on HNParent context

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