dc.contributor.author |
GODOY, S |
|
dc.contributor.author |
FUJITA, S |
|
dc.date.accessioned |
2011-01-22T10:28:46Z |
|
dc.date.available |
2011-01-22T10:28:46Z |
|
dc.date.issued |
1992 |
|
dc.identifier.issn |
0021-9606 |
|
dc.identifier.uri |
http://hdl.handle.net/11154/3526 |
|
dc.description.abstract |
With the help of quantum-scattering-theory methods and the approximation of stationary phase, a one-dimensional coherent random-walk model which describes both tunneling and scattering above the potential diffusion of particles in a periodic one-dimensional lattice is proposed. The walk describes for each lattice cell, the time evolution of modulating amplitudes of two opposite-moving Gaussian wave packets as they are scattered by the potential barriers. Since we have a coherent process, interference contributions in the probabilities bring about strong departures from classical results. In the near-equilibrium limit, Fick's law and its associated Landauer diffusion coefficient are obtained as the incoherent contribution to the quantum current density along with a novel coherent contribution which depends on the lattice properties as [(1-R)/R]1/2. |
en_US |
dc.language.iso |
en |
en_US |
dc.title |
A QUANTUM RANDOM-WALK MODEL FOR TUNNELING DIFFUSION IN A 1D LATTICE - A QUANTUM CORRECTION TO FICK LAW |
en_US |
dc.type |
Article |
en_US |
dc.identifier.idprometeo |
3400 |
|
dc.source.novolpages |
97(7):5148-5154 |
|
dc.subject.wos |
Physics, Atomic, Molecular & Chemical |
|
dc.description.index |
WoS: SCI, SSCI o AHCI |
|
dc.relation.journal |
Journal of Chemical Physics |
|