Abstract There are several proofs by now for the famous Cwikel–Lieb–Rozenblum (CLR) bound, which is a semiclassical bound on number of states Schrödinger operator, proven in 1970s. Of rather distinct Cwikel, Lieb, and Rozenblum, one Lieb gives best constant, Rozenblum does not seem to yield any reasonable estimate constants, Cwikel’s proof said give constant at least about 2 orders magnitude of...

A wide range of exotic bound systems incorporating antiprotons (atoms, atomic ions, molecules or molecular ions) can be formed, in many cases simply by replacing at least one electron a matter system an antiproton. number these have been studied over decades, while others (in particular antihydrogen) only recently the object precision measurements, and much larger set not yet explored. This rev...