EXCITED-STATES OF STRONGLY COUPLED BOUND POLARONS

The results of a numerical study of strongly coupled bound polaron eig enstates are presented. Two kinds of eigenstates with low energy exist . Firstly, there are states which are approximately hydrogen-like. Sec ondly, there are mixed states, which may be approximated as a sum of a few hydrogen-like functions. A parametrical analysis allows one to es tablish a relation between hydrogen eigenstates and bound polaron eige nstates, which is not a one-to-one correspondence but includes bifurca tions. Two kinds of bifurcations are responsible for the appearance of two types of mixed states.