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Closed Access item Particle diffraction studied using quantum trajectories

Authors:Sanz, Ángel S.
Borondo, Florentino
Miret-Artés, Salvador
Keywords:Particle diffraction, Particle interferometry, Quantum trajectories, Bohmian Mechanics, Surface Physics, Foundations of Quantum Mechanics, deBroglie-Bohm Theory, Quantum Hydrodynamics
Issue Date:31-May-2002
Publisher:Institute of Physics Publishing
Citation:Journal of Physics: Condensed Matter 14, 6109 (2002)
Abstract:Diffraction and interference of matter waves are key phenomena in quantum mechanics. Here we present some results on particle diffraction in a wide variety of situations, ranging from simple slit experiments to more complicated cases such as atom scattering by corrugated metal surfaces and metal surfaces with simple and isolated adsorbates. The principal novelty of our study is the use of the so-called Bohmian formalism of quantum trajectories. These trajectories are able to satisfactorily reproduce the main features of the experimental results and, more importantly, they provide a causal intuitive interpretation of the underlying dynamics. In particular, we will focus our attention on: (a) a revision of the concepts of near and far field in undulatory optics; (b) the transition to the classical limit, where it is found that although the quantum and classical diffraction patterns tend to be quite similar, some quantum features are maintained even when the quantum potential goes to zero; and (c) a qualitative description of the scattering of atoms by metal surfaces in the presence of a single adsorbate.
Description:37 pages, 22 figures -- PACS numbers: 03.65.-w, 03.65.Ta, 79.20.Rf
Publisher version (URL):http://dx.doi.org/10.1088/0953-8984/14/24/312
Appears in Collections:(ICMAT) Artículos

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