Modern quantum theory introduces quantum
structures (decompositions into subsystems) as a new discourse that is not
fully comparable with the classical-physics counterpart. To this end, so-called
Entanglement Relativity appears as a corollary of the universally valid quantum
mechanics that can provide for a deeper and more elaborate description of the
composite quantum systems. In this paper we employ this new concept to describe
the hydrogen atom. We offer a consistent picture of the hydrogen atom as an
open quantum system that naturally answers the following important questions: 1)
how do the so called “quantum jumps” in atomic excitation and de-excitation
occur? and 2) why does the classically and seemingly artificial “center-of-mass
relative degrees of freedom” structure appear as the primarily operable form
in most of the experimental reality of atoms?
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