Energy flow above the threshold of tunnel effect

We consider the Klein-Gordon equation on two half-axes connected at their origins. We add a potential that is constant but different on each branch. In a previous paper, we studied the L-infinity-time decay via H\"ormander's version of the stationary phase method. Here we apply these resul...

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Bibliographic Details
Published inarXiv.org
Main Authors Felix Ali Mehmeti, Haller-Dintelmann, Robert, Régnier, Virginie
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 04.11.2011
Subjects
Apertures
Energy flow
Infinity
Initial conditions
Klein-Gordon equation
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Summary:We consider the Klein-Gordon equation on two half-axes connected at their origins. We add a potential that is constant but different on each branch. In a previous paper, we studied the L-infinity-time decay via H\"ormander's version of the stationary phase method. Here we apply these results to show that for initial conditions in an energy band above the threshold of the tunnel effect a fixed portion of the energy propagates between group lines. Further we consider the situation that the potential difference tends to infinity while the energy band of the initial condition is shifted upwards such that the particle stays above the threshold of tunnel effect. We show that the total transmitted energy as well as the portion between the group lines tend to zero like the inverse of the square root of the higher potential in the corresponding branch if this potential tends to infinity. At the same time the cone formed by the group lines inclines to the t-axis while its aperture tends to zero.
ISSN:2331-8422