  The effect of Hubbard and Kondo interactions on the edge states in the
half-filled Su-Schrieffer-Heeger chain of electrons is investigated by studying
the behaviour of charge quasiparticles using Kumar representation and density
matrix renormalization group method. For any finite dimerization of hopping, by
increasing the Hubbard interaction, the edge states are found to transmigrate
from the physical charge gap to a high energy gap through an intermediate phase
without the edge states. The extent of this phase with no edge states shrinks
smoothly upon increasing the dimerization. The transmigration of edge states
from the charge gap to the high energy gap is also found to occur with Kondo
interaction, but through an intermediate phase which itself changes from having
no edge states for weak dimerization to having the edge states in the physical
as well as the high energy gaps coexisting from moderate to strong
dimerization.
