Improved Precision Measurement of the Casimir Force Using Gold Surfaces

Abstract

We report an improved precision measurement of the Casimir force using metallic gold surfaces. The force is measured between a large gold coated sphere and flat plate using an Atomic Force Microscope. The use of gold surfaces removes some theoretical uncertainties in the interpretation of the measurement. The forces are also measured at smaller surface separations. The complete dielectric spectrum of the metal is used in the comparison of theory to the experiment. The average statistical precision remains at the same 1% of the forces measured at the closest separation. These results should lead to the development of stronger constraints on hypothetical forces.

References in corpus (4)

• Casimir and van der Waals force between two plates or a sphere (lens) above a plate made of real metals
• Temperature dependence of the Casimir effect between metallic mirrors
• Casimir force at both non-zero temperature and finite conductivity
• New constraints for non-Newtonian gravity in nanometer range from the improved precision measurement of the Casimir force

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