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We show that every even-denominator fractional quantum Hall (FQH) statepossesses at least two robust, topologically distinct gapless edge phases ifcharge conservation is broken at the boundary by coupling to a superconductor.The new edge phase allows for the possibility of a direct coupling betweenelectrons and emergent neutral fermions of the FQH state. This can potentiallybe experimentally probed through geometric resonances in the tunneling densityof states at the edge, providing a probe of fractionalized, yet electricallyneutral, bulk quasiparticles. Other measurable consequences include a charge$e$ fractional Josephson effect, a charge $e/4q$ quasiparticle blocking effectin filling fraction $p/2q$ FQH states, and modified edge electron tunnelingexponents.

Superconductivity Induced Topological Phase Transition at the Edge of Even Denominator Fractional Quantum Hall States