标题： 信号、纠缠和超越柯西视界的量子演化 显示英文标题

标题： Signaling, Entanglement, and Quantum Evolution Beyond Cauchy Horizons

摘要： 考虑一个双部分纠缠系统，其中一半落入正在蒸发的黑洞事件视界，而另一半则在外部区域保持相干可实验性。在完全蒸发之后，量子态在柯西视界之后的演化不能保持幺正性，这引发了以下问题：这种演化如何被描述为量子映射，以及因果性如何保持？这种非标准量子演化映射对纠缠实验室伙伴的行为可能产生哪些影响？更普遍地说，遥远区域（不仅仅是蒸发黑洞内部，还可能是在其他裸奇点和极端时空结构区域）中的量子演化定律尚未通过观测进行测试，可能会是不幺正的，甚至是非线性的，这同样引发了关于纠缠态演化的疑问。这些问题的答案是微妙的，并以意想不到的方式与量子力学的基本定律相关联。我们表明，可以设计地球上的实验来探测和限制量子演化定律可能被改变的方式，无论是由黑洞蒸发引起的，还是由可能由未知物理支配的遥远区域的其他极端过程引起的。 显示英文摘要

摘要： Consider a bipartite entangled system half of which falls through the event horizon of an evaporating black hole, while the other half remains coherently accessible to experiments in the exterior region. Beyond complete evaporation, the evolution of the quantum state past the Cauchy horizon cannot remain unitary, raising the questions: How can this evolution be described as a quantum map, and how is causality preserved? What are the possible effects of such nonstandard quantum evolution maps on the behavior of the entangled laboratory partner? More generally, the laws of quantum evolution under extreme conditions in remote regions (not just in evaporating black-hole interiors, but possibly near other naked singularities and regions of extreme spacetime structure) remain untested by observation, and might conceivably be non-unitary or even nonlinear, raising the same questions about the evolution of entangled states. The answers to these questions are subtle, and are linked in unexpected ways to the fundamental laws of quantum mechanics. We show that terrestrial experiments can be designed to probe and constrain exactly how the laws of quantum evolution might be altered, either by black-hole evaporation, or by other extreme processes in remote regions possibly governed by unknown physics.