Measurement of the short-range attractive force between Ge plates using a torsion balance

Details Measurement of the short-range attractive force between Ge plates using a torsion balance Measurement of the short-range attractive force between Ge plates using a torsion balance

2008-12-15

arxiv.org/abs/0812.2798v2

Physical Review Letters 103, 060401 (2009)

Physics

Quantum Physics

5 pages and 4 figures, version 2

Scientific paper

We have measured the short-range attractive force between crystalline Ge plates, and found contributions from both the Casimir force and an electrical force possibly generated by surface patch potentials. Using a model of surface patch effects that generates an additional force due to a distance dependence of the apparent contact potential, the electrical force was parameterized using data at distances where the Casimir force is relatively small. Extrapolating this model, to provide a correction to the measured force at distances less than 5 $\mu$m, shows a residual force that is in agreement, within experimental uncertainty, with five models that have been used to calculate the Casimir force.

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