Visual Quantum Mechanics

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Mach-Zehnder Interferometer

by Thomas Lang

A one-dimensional model showing a particle in a box with reflecting boundary conditions and a delta-function barrier in the middle.

A Gaussian wave packet hits the delta function barrier (a semitransparent mirror) from the left. A part of it gets reflected and another part gets transmitted. The two parts are then reflected by the Dirichlet boundary conditions (mirrors) at +5 and -5 and recombined at the delta barrier. Here the left moving parts interfere destructively, and the right-moving parts interfere constructively.

Mathematica Notebook (in German)

created: 2001-07-04