  The recent proposals of experiments with single Andreev bound states make
relevant a detailed analysis of these states in multi-terminal superconducting
nanostructures. We evaluate the energy splitting of degenerate Andreev bound
states, that overlap in a superconducting lead, and find that the splitting is
reduced in comparison with their energy by a small factor $\sqrt{R G_Q}$, $R
G_Q$ being the dimensionless resistance of the overlap region in the normal
state. This permits quantum manipulation of the quasiparticles in these states.
We provide a simple scheme of such manipulation.
