Summary
For a Dirac particle subject to a central potential, conditions for the potential are obtained such that there is a bound state with zero binding energy. This is done by means of the «variable-phase approach». The potential considered consists of a Lorentz scalar and the zeroth component of a Lorentz vector, and vanishes asymptotically.
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The authors of this paper have agreed to not receive the proofs for correction.
On leave from Department of Physics, Science University of Tokyo, Tokyo 162, Japan.
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Suzuki, A., Nogami, Y. Variable-phase approach to the dirac equation—bound states. Nuov Cim B 108, 303–312 (1993). https://doi.org/10.1007/BF02887490
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DOI: https://doi.org/10.1007/BF02887490