Relativistic Tunneling Through Two Successive Barriers

Details Relativistic Tunneling Through Two Successive Barriers Relativistic Tunneling Through Two Successive Barriers

2007-08-26

arxiv.org/abs/0708.3507v2

Phys. Rev. A 76, 042111 (2007)

Physics

Quantum Physics

7 pages, 3 figures. Revised version, with a new appendix added. Slightly changes in the styles and captions of Figures 1 and 2

Scientific paper

10.1103/PhysRevA.76.042111

We study the relativistic quantum mechanical problem of a Dirac particle tunneling through two successive electrostatic barriers. Our aim is to study the emergence of the so-called \emph{Generalized Hartman Effect}, an effect observed in the context of nonrelativistic tunneling as well as in its electromagnetic counterparts, and which is often associated with the possibility of superluminal velocities in the tunneling process. We discuss the behavior of both the phase (or group) tunneling time and the dwell time, and show that in the limit of opaque barriers the relativistic theory also allows the emergence of the Generalized Hartman Effect. We compare our results with the nonrelativistic ones and discuss their interpretation.

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