论文标题
实验友好的量子回流配方
Experiment-friendly formulation of quantum backflow
论文作者
论文摘要
量子回流通常被理解为量子干扰现象，其中量子粒子点的概率电流与粒子的动量相反。在这里，我们量化了任意动量分布的量子回流量，为其实验验证铺平了道路。我们给出了重力和谐波潜力中回流的例子，并讨论使用原子重量表进行演示所需的实验程序。这样的实验将表明，在大多数动量下降的情况下，找到适当准备的量子状态的自由掉落粒子的可能性可能会增长。
Quantum backflow is usually understood as a quantum interference phenomenon where probability current of a quantum particle points in the opposite direction to particle's momentum. Here, we quantify the amount of quantum backflow for arbitrary momentum distributions, paving the way towards its experimental verification. We give examples of backflow in gravitational and harmonic potential, and discuss experimental procedures required for the demonstration using atomic gravimeters. Such an experiment would show that the probability of finding a free falling particle above initial level could grow for suitably prepared quantum state with most momentum downwards.
