  We describe an approach to the study of neutrino masses that combines quantum
optics techniques with radiation detectors to obtain unprecedented sensitivity.
With it the search for Majorana neutrino masses down to $\sim$10 meV will
become accessible. The experimental technique uses the possibility of
individually detecting $\rm Ba^+$-ions in the final state of $\rm ^{136}Xe$
double-beta decay via resonant excitation with a set of lasers aimed at a
specific location in a large Time Projection Chamber. The specificity of the
atomic levels provides tagging and, together with more traditional event
recognition parameters, greatly suppresses radioactive backgrounds.
