Quantum walk of two non-interacting particles on a 2D lattice
Qi Han, Ning Bai, Shuai Wang, Lijie Gou, Rong Zhang · Europhysics Letters (EPL) · 2024
Abstract In this paper, it is sufficient to simply tensor the single-particle unitary operator U 1 for the evolution operator U 2 of two particles that do not have interactions. Subsequently, the operator U 1 is diagonalized and the relative distance between two non-interacting particles on the 2D lattice at the moment t is obtained using the distance evolution operator.