Encoding beyond cosmological horizons in de Sitter JT gravity. (English) Zbl 1541.83053
Summary: 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.
MSC:
| 83C57 | Black holes |
| 81T40 | Two-dimensional field theories, conformal field theories, etc. in quantum mechanics |
| 83C45 | Quantization of the gravitational field |
| 83E30 | String and superstring theories in gravitational theory |
| 81T30 | String and superstring theories; other extended objects (e.g., branes) in quantum field theory |
| 83E05 | Geometrodynamics and the holographic principle |
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