  We study a tunneling geometry defined by a single point-contact constriction
that brings to close vicinity two points sitting at the same edge of a quantum
Hall liquid, shortening the trip between the otherwise spatially separated
points along the normal chiral edge path. This ``wormhole''-like geometry
allows for entrapping bulk quasiparticles between the edge path and the tunnel
junction, possibly realizing a topologically protected qubit if the
quasiparticles have non-Abelian statistics. We show how either noise or simpler
voltage measurements along the edge can probe the non-Abelian nature of the
trapped quasiparticles.
