  Symmetry of the order parameter in some triplet superconductors corresponds
to doubly-degenerate chiral states. We predict that in a sufficiently small
sample this degeneracy can be lifted via macroscopic quantum tunneling.
Moreover, if the initial state is prepared correspondingly, 'instanton'-like
quantum behavior is possible in a single-domain sample. In this case coherent
oscillations of magnetic momentum should take place, as well as the sign
alternations of the boundary currents. In particular, spontaneous Hall-effect
recently predicted for ruthenates should posses the oscillating voltage
feature.
