  Bipartite composite boson (quasiboson) systems, which admit realization in
terms of deformed oscillators, were considered in our previous paper from the
viewpoint of entanglement characteristics. These characteristics, including
entanglement entropy and purity, were expressed through the relevant
deformation parameter for different quasibosonic states. On the other hand, it
is of interest to present the entanglement entropy and likewise the purity as
function of energy for those states. In this work, the corresponding
dependencies are found for different states of composite bosons realized by
deformed oscillators and, for comparison, also for the hydrogen atom viewed as
composite boson. The obtained results are expressed graphically and their
implications discussed.

Quantum Physics;Statistical Mechanics;High Energy Physics - Theory