New solutions of Isochronous potentials in terms of exceptional orthogonal polynomials in heterostructures

Abstract

Point canonical transformation (PCT) has been used to find out new exactly solvable potentials in the position-dependent mass (PDM) framework. We solve $1$-D Schrödinger equation in the PDM framework by considering two different fairly generic position-dependent masses $(i)M(x)=\hat{I}»g^{\prime }(x)$ and $(ii)M(x)=c{\left(g^{\prime }(x)\right)}^{\hat{I}}½$, $\hat{I}½=\frac{2\hat{I}\cdot }{2\hat{I}\cdot +1},$ with $\hat{I}\cdot =0,1,2\cdots$. In the first case, we find new exactly solvable potentials that depend on an integer parameter $m$, and the corresponding solutions are written in terms of $X_m$-Laguerre polynomials. In the latter case, we obtain a new one parameter $(\hat{I}½)$ family of isochronous solvable potentials whose bound states are written in terms of $X_m$-Laguerre polynomials. Further, we show that the new potentials are shape invariant by using the supersymmetric approach in the framework of PDM.

17 pages, 5 Figs, Latex