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Title of article :
Local group velocity and path-delay: semi-classical propagators for the time evolution of Wigner functions in deep tunneling and in dispersive media
Author/Authors :
Y.B and Kallush، نويسنده , , S. and Tannenbaum، نويسنده , , E. and Segev، نويسنده , , Bilha، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
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Abstract :
Controlled semi-classical approximations for the evolution kernels (the propagators) of the Wigner function in the cases of tunneling and propagation in dispersive media are derived. The semi-classical propagators follow well defined trajectories determined by the local group velocity and a path delay which is a multi-dimensional generalization of Wigner phase-delay time. A comparison between exact and semi-classical time evolution gives good agreement for propagation in dispersive media if the harmonic term in the dispersion relation is the dominant term and excellent agreement for deep tunneling.
Journal title :
Chemical Physics Letters
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Link To Document :