Measurement of the Casimir Force between Dissimilar Metals
نویسندگان
چکیده
منابع مشابه
Measurement of the Casimir force between dissimilar metals.
The first precise measurement of the Casimir force between dissimilar metals is reported. The attractive force, between a Cu layer evaporated on a microelectromechanical torsional oscillator and an Au layer deposited on an Al2O3 sphere, was measured dynamically with a noise level of 6 fN/sqrt[Hz]. Measurements were performed for separations in the 0.2-2 micro m range. The results agree to bette...
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Recently there have been two papers by a combined experimental and theoretical collaboration [1, 2] that have strongly criticized our work on the temperature dependence of the Casimir force between a spherical lens and a plate, both coated with real metals (Au for example) [3]. They criticize our work as being in conflict with fundamental thermodynamical requirements, particularly the third law...
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The new approach to the theoretical description of the thermal Casimir force between real metals is presented. It uses the plasma-like dielectric permittivity that takes into account the interband transitions of core electrons. This permittivity precisely satisfies the Kramers-Kronig relations. The respective Casimir entropy is positive and vanishes at zero temperature in accordance with the Ne...
متن کاملMeasurement of the Casimir force between parallel metallic surfaces.
We report on the measurement of the Casimir force between conducting surfaces in a parallel configuration. The force is exerted between a silicon cantilever coated with chromium and a similar rigid surface and is detected by looking at the shifts induced in the cantilever frequency when the latter is approached. The scaling of the force with the distance between the surfaces was tested in the 0...
متن کاملImproved Precision Measurement of the Casimir Force
We report an improved precision measurement of the Casimir force. The force is measured between a large Al coated sphere and flat plate using an Atomic Force Microscope. The primary experimental improvements include the use of smoother metal coatings, reduced noise, lower systematic errors and independent measurement of surface separations. Also the complete dielectric spectrum of the metal is ...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2003
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.91.050402