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Physical Review D

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Causal patch complementarity: The inside story for old black holes

Irfan Ilgin and I-Sheng Yang

IOP and GRAPPA, Universiteit van Amsterdam, Science Park 904, 1090 GL Amsterdam, Netherlands

Phys. Rev. D 89, 044007 – Published 11 February, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.044007

Abstract

We carefully analyze the causal patches which belong to observers falling into an old black hole. We show that without a distillation-like process, the Almheiri-Marolf-Polchinski-Sully (AMPS) paradox cannot challenge complementarity. That is because the two ingredients for the paradox, the interior region and the early Hawking radiation, cannot be spacelike separated and both low energy within any single causal patch. Either the early quanta have Planckian wavelengths, or the interior region is exponentially smaller than the Schwarzschild size. This means that their appearances in the low-energy theory are strictly timelike separated, which nullifies the problem of double entanglement/purity or quantum cloning. This verifies that the AMPS paradox is either only a paradox in the global description like the original information paradox, or a direct consequence of the assumption that a distillation process is feasible without hidden consequences. We discuss possible relations to cosmological causal patches and the possibility of transferring energy without transferring quantum information.

Article Text

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