New Solvable and Quasi Exactly Solvable Periodic Potentials

Details New Solvable and Quasi Exactly Solvable Periodic Potentials New Solvable and Quasi Exactly Solvable Periodic Potentials

1999-06-14

arxiv.org/abs/quant-ph/9906044v1

J.Math.Phys. 40 (1999) 5473-5494

Physics

Quantum Physics

24 pages and 10 figures

Scientific paper

10.1063/1.533040

Using the formalism of supersymmetric quantum mechanics, we obtain a large number of new analytically solvable one-dimensional periodic potentials and study their properties. More specifically, the supersymmetric partners of the Lame potentials ma(a+1)sn^2(x,m) are computed for integer values a=1,2,3,.... For all cases (except a=1), we show that the partner potential is distinctly different from the original Lame potential, even though they both have the same energy band structure. We also derive and discuss the energy band edges of the associated Lame potentials pm sn^2(x,m)+qm cn^2(x,m)/ dn^2(x,m), which constitute a much richer class of periodic problems. Computation of their supersymmetric partners yields many additional new solvable and quasi exactly solvable periodic potentials.

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