Isospectral partners for a complex PT-invariant potential
Anjana Sinha, Rajkumar Roychoudhury
Abstract
We construct isospectral partner potentials of a complex PT-invariant potential, viz., V(x) = V1 sech 2 x - i V2 sech x tanh x using Darboux's method. Oneset of isospectral potentials are obatined which can be termed 'Satellite potentials', in the sense that they are pf the same form as the original potential. In a particular case, the supersymmetric partner potential has the same spectrum, including the zero energy ground state, a fact which cannot occur in conventional supersymmetric quantum mechanics with real potential. An explicit example of a non-trivial set of isospectral potential is also obtained.
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