  We calculate the current noise power spectrum in a nanoscopic interferometer
consisting of a Majorana bound state (MBS) and a localized spin. We show that
for large voltage (though less than the superconducting gap) several strong
resonance peaks appear at frequencies that depend on the Zeeman splitting of
the localized spin and on its tunneling to the localized spin. We also evaluate
the differential conductance and find the unitary limit peak $2e^2/h$ at zero
voltage as well as peaks at voltages corresponding to the resonances. We
propose that detection of the resonances and related peaks in the differential
conductance provide a strong support for the presence of an MBS.
