We show that current correlations at the exit ports of a beam splitter can be
used to detect electronic entanglement for a fairly general input state. This
includes the situation where electron pairs can enter the beam splitter from
the same port or be separated due to backscattering. The proposed scheme allows
to discriminate between occupation-number and degree-of-freedom entanglement.Comment: 5 pages, 1 figure. Ref. adde