  A quantum Hall interferometer containing a grounded superconducting terminal
is proposed. This geometry allows to control the Andreev and normal scattering
amplitudes of sub-gap Bogoliubov quasiparticles with the Aharonov-Bohm phase,
as well as with the constrictions defining the interferometer loop. The
conductance matrix of such a three-terminal NSN interference device exhibits a
much richer behavior as compared to its two-terminal Fabry-P\'erot counterpart,
which is illustrated by non-trivial behavior of non-local charge and heat
responses. A single edge version of the interferometer enables full on-demand
control of the electron-hole superposition, including resonant enhancement of
arbitrary small Andreev reflection probability up to 1, and can be used as a
building block in future more complex interference setups.

Mesoscale and Nanoscale Physics;Superconductivity