论文标题
重力，量子场和量子信息：经典渠道和随机理论的问题
Gravity, Quantum Fields and Quantum Information: Problems with classical channel and stochastic theories
论文作者
论文摘要
近年来，越来越多的论文试图模仿或取代量子场理论，讨论工具与重力相关的问题以及通过量子信息理论的观点，通常是在替代量子理论的背景下。在本文中，我们指出了此类治疗中的三个常见问题。首先，我们表明，信息通道介导的相互作用的概念通常不等于量子场理论对相互作用的处理。当用来描述重力时，该概念可能导致与一般相对论的不一致。其次，我们指出，通常不能通过经典随机来源替换量子场，也不能通过经典的噪声模拟量子波动的影响，因为在这样做的重要量子特征（例如相干性和纠缠）中，将被排除。第三，我们解释了如何在特定条件下半古典和随机的理论从其量子起源提出，并在某些感兴趣的方案中发挥作用。
In recent years an increasing number of papers attempt to mimic or supplant quantum field theory in discussions of issues related to gravity by the tools and through the perspective of quantum information theory, often in the context of alternative quantum theories. In this essay, we point out three common problems in such treatments. First, we show that the notion of interactions mediated by an information channel is not, in general, equivalent to the treatment of interactions by quantum field theory. When used to describe gravity, this notion may lead to inconsistencies with general relativity. Second, we point out that in general one cannot replace a quantum field by that of classical stochastic sources, or mock up the effects of quantum fluctuations by classical noises, because in so doing important quantum features such as coherence and entanglement will be left out. Third, we explain how under specific conditions semi-classical and stochastic theories indeed can be formulated from their quantum origins and play a role at certain regimes of interest.
