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http://hdl.handle.net/11154/1798
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Title: | Time scale of forerunners in quantum tunneling |
Authors: | Villavicencio, J Delgado, F Muga, JG García-Calderon, G |
Issue Date: | 2002 |
Abstract: | The forerunners preceding the main tunneling signal of the wave created by a source with a sharp onset or by a quantum shutter have been generally associated with over-the-barrier (nontunneling) components. We demonstrate that, while this association is true for distances that are larger than the penetration length, for smaller distances the forerunner is dominated by under-the-barrier components. We find that its characteristic arrival time is inversely proportional to the difference between the barrier energy and the incidence energy, a tunneling time scale different from both the phase time and the Buttiker-Landauer time. |
URI: | http://hdl.handle.net/11154/1798 |
ISSN: | 1050-2947 |
Appears in Collections: | Ciencias
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