  All real physical processes, including of the first-passage time, occur with
a change in entropy. This circumstance is not taken into account when studying
the first-passage time, but is illustrated in this article using the example of
electron transfer through a metallic double dot. The statistics of the
first-passage time of a random process N(t) for electrons transferred through a
metallic double dot is considered. The expressions for the average
first-passage time are compared with and without taking into account the change
in entropy during this time. External influences on the average value of the
first-passage time are considered for the case of DC bias voltage.
