Electrostatic Background Forces due to Varying Contact Potentials in Casimir Experiments

Details Electrostatic Background Forces due to Varying Contact Potentials in Casimir Experiments Electrostatic Background Forces due to Varying Contact Potentials in Casimir Experiments

2008-08-06

arxiv.org/abs/0808.0885v2

Physics

Quantum Physics

4 pages version 2 points out that the determined V_a should not be included in the energy derivative for the force

Scientific paper

The existence of a monotonic distance dependent contact potential between two plates in a Casimir experiment leads to an additional electrostatic force that is significantly different from the case of a constant potential. Such a varying potential can arise if there is a uniform gradient in the work function or contact potential across a plate, as opposed to random microscopic fluctuations associated with patch potentials. A procedure to compensate for this force is described for the case of an experiment where the electrostatic force is minimized at each measurement distance by applying a voltage between the plates. It is noted that the minimizing voltage is not the contact potential.

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