  We investigate the low-energy theory of a one-dimensional finite capacitance
topological Josephson junction. Charge fluctuations across the junction couple
to resonant microwave fields and can be used to probe microscopic excitations
such as Majorana and Andreev bound states. This marriage between localized
microscopic degrees of freedom and macroscopic dynamics of the superconducting
phase, leads to unique spectroscopic patterns which allow us to reveal the
presence of Majorana fermions among the low-lying excitations.
