  Despite the astonishing successes of quantum mechanics, due to some
fundamental problems such as the measurement problem and quantum arrival time
problem, the predictions of the theory are in some cases not quite clear and
unique. Especially, there are various predictions for the joint spatiotemporal
distribution of particle detection events on a screen, which are derived from
different formulations and interpretations of the quantum theory. Although the
differences are typically small, our studies show that these predictions can be
experimentally distinguished by an unconventional double-slit configuration,
which is realizable using present-day single-atom interferometry. This
experiment would enrich our understanding of the foundations of quantum
mechanics.
