论文标题
量子状态读数，崩溃，探针和信号
Quantum State Readout, Collapses, Probes and Signals
论文作者
论文摘要
涉及局部崩溃的理论允许可以在不使用POVM的情况下获得有关量子状态的经典信息，而无需允许超亮信号传导。我们可以通过将量子理论扩展到包括假设的设备来对此进行建模，这些设备在给定点上读取有关局部量子状态的信息，这是通过考虑在过去的光锥中仅倒塌而定义的。像Popescu-Rohrlich的盒子一样，这些假设的设备如果可以实现的话，将具有实用和科学的含义。其中包括通过不透明介质的信号传导，探测远处或不透明系统的物理，而无需反射信号并提供有关塌陷动态的详细信息，而无需直接观察崩溃的系统。这些潜在的应用激发了系统的搜索，以了解量子理论的这些非标准扩展的可能签名，尤其是相关的重力效应，例如小尺度上半古典引力的有效性。
Theories involving localized collapse allow the possibility that classical information could be obtained about quantum states without using POVMS and without allowing superluminal signalling. We can model this by extending quantum theory to include hypothetical devices that read out information about the local quantum state at a given point, defined by considering only collapses in its past light cone. Like Popescu-Rohrlich boxes, these hypothetical devices would have practical and scientific implications if realisable. These include signalling through opaque media, probing the physics of distant or opaque systems without needing a reflected signal and giving detailed information about collapse dynamics without requiring direct observation of the collapsing system. These potential applications motivate systematic searches for possible signatures of these nonstandard extensions of quantum theory, and in particular for relevant gravitational effects, such as the validity of semi-classical gravity on small scales.
