Scribble at 2017-03-08 15:17:21 Last modified: 2022-09-20 09:21:10
In this paper we discuss quantum computational restrictions on the types of thought experiments recently used by Almheiri, Marolf, Polchinski, and Sully to argue against the smoothness of black hole horizons. We argue that the quantum computations required to do these experiments take a time which is exponential in the entropy of the black hole under study, and we show that for a wide variety of black holes this prevents the experiments from being done. We interpret our results as motivating a broader type of non-locality than is usually considered in the context of black hole thought experiments, and claim that once this type of non-locality is allowed there may be no need for firewalls. Our results do not threaten the unitarity of of black hole evaporation or the ability of advanced civilizations to test it.
スコット・アロンソンが取り上げていた、ハーロウ＝ヘイデンの仮説（あるいは逆説とか予測と呼ばれることもある）について述べてある原論文。これと併せてレオナルド・サスキンドの論文も読むべきなのだろう。そもそもは NP 完全についてドキュメントを物色していたらアロンソンのサイトがすぐに出てきたからだった。量子情報理論は、まだ科学哲学では興味深い議論が出ていないように思うのだけれど、これ自体として面白そうな分野だ。