Huygens-Fresnel-Kirchhoff construction for quantum propagators with application to diffraction in space and time

Details Huygens-Fresnel-Kirchhoff construction for quantum propagators with application to diffraction in space and time Huygens-Fresnel-Kirchhoff construction for quantum propagators with application to diffraction in space and time

2012-01-06

arxiv.org/abs/1201.1389v1

Phys. Rev. A 85, 013626 (2012)

Physics

Quantum Physics

11 pages, 3 figures

Scientific paper

10.1103/PhysRevA.85.013626

We address the phenomenon of diffraction of non-relativistic matter waves on openings in absorbing screens. To this end, we expand the full quantum propagator, connecting two points on the opposite sides of the screen, in terms of the free particle propagator and spatio-temporal properties of the opening. Our construction, based on the Huygens-Fresnel principle, describes the quantum phenomena of diffraction in space and diffraction in time, as well as the interplay between the two. We illustrate the method by calculating diffraction patterns for localized wave packets passing through various time-dependent openings in one and two spatial dimensions.

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