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- W1993632908 abstract "Quantum and semiclassical calculations of complex energy eigenvalues have been carried out for an exponential potential of the form V0r2 exp(−r) and Lennard-Jones (12,6) potential. A straightforward method, based on the complex coordinate rotation technique, is described for the quantum calculation of complex eigenenergies. For singular potentials, the method involves an inward and outward integration of the radial Schrödinger equation, followed by matching of the logarithmic derivatives of the wave functions at an intermediate point. For regular potentials, the method is simpler, as only an inward integration is required. Attention is drawn to the World War II researches of Hartree and co-workers who anticipated later quantum mechanical work on the complex rotation method. Complex eigenenergies are also calculated from a uniform semiclassical three turning point quantization formula, which allows for the proximity of the outer pair of complex turning points. Limiting cases of this formula, which are valid for very narrow or very broad widths, are also used in the calculations. We obtain good agreement between the semiclassical and quantum results. For the Lennard-Jones (12,6) potential, we compare resonance energies and widths from the complex energy definition of a resonance with those obtained from the time delay definition." @default.
- W1993632908 created "2016-06-24" @default.
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- W1993632908 date "1983-05-15" @default.
- W1993632908 modified "2023-09-23" @default.
- W1993632908 title "Quantum complex rotation and uniform semiclassical calculations of complex energy eigenvalues" @default.
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- W1993632908 doi "https://doi.org/10.1063/1.444579" @default.
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