We investigate temporal Young’s double-slit interferences of a quantum fluxon in quantum Josephson nanocircuits,in order to explore the nonlocality of time at macroscopic scales.We employ Gaussian wave-packet approaches to describe the time evolution of the quantum fluxon.We obtained an analytic formula for the probability density of finding the quantum fluxon at a detector’s position as a function of time,and found interference fringes in the time domain.This shows nonlocal nature of time at macroscopic scales and also provides potential applications for a new type of building blocks of quantum information in solid state devices.
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