论文标题
使用最大路径键入量子状态测量时空曲率
Measuring space-time curvature using maximally path-entangled quantum states
论文作者
论文摘要
量子场理论和一般相对性的界面的实验将极大地使理论研究对其统一有利。到目前为止进行的量子实验的引力方面可以在牛顿重力或爱因斯坦的等效原理中解释。在这里，我们描述了一种用最大路径符合光量子状态的riemann曲率张量的组件的方法。我们表明，纠缠诱导的敏感性增加也对马赫 - 齐汉德干涉仪中重力诱导的相也是。结果，通过测量重力梯度排除平坦时空所需的两个干涉仪臂之间的高度差可以大大降低。
Experiments at the interface of quantum field theory and general relativity would greatly benefit theoretical research towards their unification. The gravitational aspects of quantum experiments performed so far can be explained either within Newtonian gravity or by Einstein's equivalence principle. Here, we describe a way to measure components of the Riemann curvature tensor with maximally path-entangled quantum states of light. We show that the entanglement-induced increase in sensitivity also holds for gravitationally-induced phases in Mach-Zehnder interferometers. As a result, the height difference between the two interferometer arms necessary to rule out flat space-time by measuring gravity gradients can be significantly reduced.
