Abstract
It is shown that a gravitational potential difference between the two components of a split fermion beam in a fermion interferometer modulates the cross-correlation in particle fluctuations and the variance in difference counts of the two output beams at two detectors. The proposed effects are fermionic analogues of the optical Hanbury Brown-Twiss experiments and differ substantially both in concept and in observational procedure from the Colella-Overhauser-Werner experiment with neutrons. The effects should be observable with present field-emission electron beams and future cold neutron beams of higher brightness.
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