Two small beads are situated at distance a apart on an otherwise uniform taut string. A transverse wave of angular frequency ω is incident from one side, exerting longitudinal forces and respectively, on the beads. The effective “force of attraction” between the beads, is the simplest classical analog to the Casimir effect. We find that can be positive or negative, depending on the values of a and ω. For a broad spectrum of incident “noise,” however, the net “Casimir” force is zero.
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PAPERS| November 01 2001
Classical Casimir effect for beads on a string
David J. Griffiths;
David J. Griffiths, Elan Ho; Classical Casimir effect for beads on a string. Am. J. Phys. 1 November 2001; 69 (11): 1173–1176. https://doi.org/10.1119/1.1396620
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