Probability Density for an Electron Passing through Two Narrow Slits

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This Demonstration shows the quantum mechanical probability distribution of an electron passing through two narrow slits, which produces an interference pattern.

Contributed by: Enrique Zeleny (July 2012)
Based on a program by: Paul Nylander
Open content licensed under CC BY-NC-SA



The finite-difference Crank–Nicolson method with time-splitting is used to solve the Schrödinger equation.

For more information, see the Wikipedia entry for "Crank–Nicolson method".


[1] B. Thaller, Visual Quantum Mechanics, New York: Springer-TELOS, 2000.

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