A note on a relation between ac Josephson effect and double-well BEC oscillations

In this brief note we comment on the relation between the ac Josephson effect and the coherent oscillations of a Bose-Einstein condensate confined to a double-well potential. The goal is to elucidate the extent to which the latter is a realization of the former. We detail the correspondence that emerges in the high occupation limit of the double-well potential, and particularly note the relation between the two oscillation frequencies.