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Particle diffraction studied using quantum trajectories

AutorSanz, Ángel S. ; Borondo, Florentino; Miret-Artés, Salvador
Palabras claveParticle diffraction
Particle interferometry
Quantum trajectories
Bohmian Mechanics
Surface Physics
Foundations of Quantum Mechanics
deBroglie-Bohm Theory
Quantum Hydrodynamics
Fecha de publicación31-may-2002
EditorInstitute of Physics Publishing
CitaciónJournal of Physics: Condensed Matter 14, 6109 (2002)
ResumenDiffraction 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.
Descripción37 pages, 22 figures -- PACS numbers: 03.65.-w, 03.65.Ta, 79.20.Rf
Versión del editorhttp://dx.doi.org/10.1088/0953-8984/14/24/312
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