Interesting non-linear generalization of both Schrödinger’s and Klein–Gordon’s equations have been recently advanced by Tsallis, Rego-Monteiro and Tsallis (NRT) in Nobre et al. (Phys. Rev. Lett.
2011, 106, 140601). There is much current activity going on in this area. The non-linearity is governed by a real parameter q
. Empiric hints suggest that the ensuing non-linear q
-Schrödinger and q
-Klein–Gordon equations are a natural manifestations of very high energy phenomena, as verified by LHC-experiments. This happens for
values close to unity (Plastino et al. (Nucl. Phys. A
2016, 955, 16–26, Nucl. Phys. A
2016, 948, 19–27)). It might thus be difficult for q
-values close to unity to ascertain whether one is dealing with solutions to the ordinary Schrödinger equation (whose free particle solutions are exponentials and for which
) or with its NRT non-linear q
-generalizations, whose free particle solutions are q
-exponentials. In this work, we provide a careful analysis of the
instance via a perturbative analysis of the NRT equations.
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