Quantum backflow in the presence of a purely transmitting defect

Quantum backflow and scattering

Backflow is the phenomenon that the probability current of a quantum particle on the line can flow in the direction opposite to its momentum. In this article, previous investigations of backflow, pertaining to interaction-free dynamics or purely kinematical aspects, are extended to scattering situations in short-range potentials. It is shown that backflow is a universal quantum effect which exists in any such potential, and is always of bounded spatial extent in a specific sense. The effects of reflection and transmission processes on backflow are investigated, both analytically for general po…

量子与经典的$P$-可分性

Quantum versus classical $P$-divisibility

针对经典与量子非马尔可夫过程中的$P$-可分性，研究揭示量子生成器的$P$-可分性与经典约化的可分性等价，但动力学映射约化时该等价性失效，还阐释了纯耗散及正交协变量子比特动力学中量子与经典$P$-可分性的关系及信息回流机制。