Abstract
A case study of field emission from a zero-range quantum well has been carried out. The various strong-field approximations, both time-dependent and time-independent, are discussed and compared with exact numerical results. The exponential decay law is shown to be a good approximation on the average, but it cannot account for short-time ripples in the ionisation probability.
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Elberfeld, W., Kleber, M. Tunneling from an ultrathin quantum well in a strong electrostatic field: A comparison of different methods. Z. Physik B - Condensed Matter 73, 23–32 (1988). https://doi.org/10.1007/BF01312151
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DOI: https://doi.org/10.1007/BF01312151