We're well versed on the first-passage time for a random process, but the time required to cover more than one site in a system is a different problem altogether. It turns out that the two measures have more in common than we thought.
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Barkai, E. Universal exploration. Nature Phys 11, 807–808 (2015). https://doi.org/10.1038/nphys3445
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DOI: https://doi.org/10.1038/nphys3445
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