Absolutely transparent multichannel systems. Unexpected peculiarities

Abstract A simple explanation of the discovered unexpected behavior of the potential matrices V ij ( x ) for the reflectionless complex quantum systems is given. There appear barriers in V ij ( x ), but they don't violate the transparency! The are even necessary for the full penetrability, which sounds paradoxical. The partial reflection caudes by them plays a significant part in damping the other components of the whole reflection (new penetrability mechanism).