Apparatus for measuring the thermal Casimir force at large distances
arXiv:1410.4476 · doi:10.1103/PhysRevLett.113.240405
Abstract
We describe a Casimir apparatus based on a differential force measurement between a Au-coated sphere and a planar slab divided in two regions, one of which is made of high-resistivity (dielectric) Si, and the other of Au. The crucial feature of the setup is a semi-transparent plane parallel conducting over-layer, covering both regions. The setup offers two important advantages over existing Casimir setups. On one hand it leads to a large amplification of the difference between the Drude and the plasma prescriptions that are currently used to compute the thermal Casimir force. On the other hand, thanks to the screening power of the over-layer, it is in principle immune from electrostatic forces caused by potential patches on the plates surfaces, that plague present large distance Casimir experiments. If a semi-transparent conductive over-layer with identical patch structure over the Au-Si regions of the plate can be manufactured, similar to the opaque over-layers used in recent searches of non-newtonian gravitational forces based on the isoelectronic technique, the way will be paved for a clear observation of the thermal Casimir force up to separations of several microns, and an unambiguous discrimination between the Drude and the plasma prescriptions.
5 pages, 3 encapsulated figures. Revised version accepted for publication in Phys. Rev. Lett
References in corpus (10)
- Novel constraints on light elementary particles and extra-dimensional physics from the Casimir effect
- Measurement of the Casimir force between a gold sphere and silicon surface with nanoscale trench arrays
- Halving the Casimir force with conductive oxides
- Demonstration of the Casimir force between ferromagnetic surfaces of a Ni-coated sphere and a Ni-coated plate
- Experimental test for the conductivity properties from the Casimir force between metal and semiconductor
- Casimir effect in a superconducting cavity and the thermal controversy
- Microscopic theory of the Casimir force at thermal equilibrium: large-separation asymptotics
- Kelvin probe force microscopy of metallic surfaces used in Casimir force measurements
- Low noise cryogenic system for the measurement of Casimir energy in rigid cavities
- An experimental apparatus for measuring the Casimir effect at large distances
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