The upside-down *-x^4*, *-x^6*, and *-x^8* potentials with appropriate PT-symmetric boundary conditions have real, positive, and discrete quantum-mechanical spectra. This paper proposes a straightforward macroscopic quantum-mechanical scattering experiment in which one can observe and measure these bound-state energies directly.

July 23, 2016

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Scattering off PT-symmetric upside-down potentials

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