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arxiv: hep-th/0210160 · v2 · submitted 2002-10-16 · ✦ hep-th

Recurrent Nightmares?: Measurement Theory in de Sitter Space

classification ✦ hep-th
keywords spacemeasurementquantumsitterimpliesmathematicaltheoryargue
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The idea that asymptotic de Sitter space can be described by a finite Hilbert Space implies that any quantum measurement has an irreducible innacuracy. We argue that this prevents any measurement from verifying the existence of the Poincare recurrences that occur in the mathematical formulation of quantum de Sitter (dS) space. It also implies that the mathematical quantum theory of dS space is not unique. There will be many different Hamiltonians, which give the same results, within the uncertainty in all possible measurements.

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  1. Dark energy from string theory: an introductory review

    hep-th 2026-03 unverdicted novelty 2.0

    String theory imposes constraints on dark energy but permits various construction attempts for de Sitter vacua and single-field exponential quintessence models despite obstructions.