Encoding beyond cosmological horizons in de Sitter JT gravity

Abstract

Black hole event horizons and cosmological event horizons share many properties, making it natural to ask whether our recent advances in understanding black holes generalize to cosmology. To this end, we discuss a paradox that occurs if observers can access what lies beyond their cosmological horizon in the same way that they can access what lies beyond a black hole horizon. In particular, distinct observers with distinct horizons may encode the same portion of spacetime, violating the no-cloning theorem of quantum mechanics. This paradox is due precisely to the observer-dependence of the cosmological horizon -- the sharpest difference from a black hole horizon -- although we will argue that the gravity path integral avoids the paradox in controlled examples.

arXiv comment28 pages, 17 figures

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Cited by in corpus (8)

• Island formula in Planck brane
• Bridging the static patches: de Sitter holography and entanglement
• Casimir Energy and Modularity in Higher-dimensional Conformal Field Theories
• Implication of island for inflation and primordial perturbations
• Islands in Proliferating de Sitter Spaces
• Closed FRW holography: A time-dependent ER=EPR realization
• Horizon causality from holographic scattering in asymptotically dS${}_3$
• Non-extremal Island in de Sitter Gravity