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Quantum Physics

Title: Time scale of forerunners in quantum tunneling

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 (non-tunneling) components. We demonstrate that, while this association is true for distances which are larger than the penetration lenght, 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 B\"uttiker-Landauer (BL) time.
Comments: Revtex4, 14 eps figures
Subjects: Quantum Physics (quant-ph)
DOI: 10.1103/PhysRevA.66.042119
Cite as: arXiv:quant-ph/0206020
  (or arXiv:quant-ph/0206020v1 for this version)

Submission history

From: J. G. Muga [view email]
[v1] Tue, 4 Jun 2002 09:28:00 GMT (116kb)