论文标题
在Sitter JT重力中编码超出宇宙学视野
Encoding beyond cosmological horizons in de Sitter JT gravity
论文作者
论文摘要
黑洞事件的视野和宇宙事件视野具有许多特性，使我们询问我们最近在理解黑洞方面的进步是否概括为宇宙学是很自然的。为此，我们讨论了一个悖论，如果观察者可以访问其宇宙学上的位置，就像他们可以访问超出黑洞地平线的东西一样。特别是，具有不同视野的独特观察者可能会编码时空的相同部分，从而违反了量子力学的无关定理。这种悖论恰恰是由于宇宙学范围的观察者依赖性 - 与黑洞地平线相比最锐利的差异 - 尽管我们会争辩说，重力路径积分避免了受控示例中的悖论。
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.
