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首页> 外文期刊>International Journal of Modern Physics, A. Particles and Fields, Gravitation, Cosmology >NEW RESULTS FOR THE CASIMIR INTERACTION:SAMPLE CHARACTERIZATION AND LOW TEMPERATURE MEASUREMENTS
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NEW RESULTS FOR THE CASIMIR INTERACTION:SAMPLE CHARACTERIZATION AND LOW TEMPERATURE MEASUREMENTS

机译:卡西米尔相互作用的新结果:样品表征和低温测量

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We describe our latest results in the separation dependence of the Casimir interaction in the sphere-plane geometry for two Au-coated surfaces. All results are obtained by measuring the change in the resonant frequency of a sensitive microelectromechanical torsional oscillator as the separation between the sphere and the plane is changed. By means of the proximity force approximation, the change in resonant frequency yields the Casimir pressure between two parallel plates at the same separation. We present results for a new sample at room temperature, where the dielectric function has been measured in the 190-825 nm range. We show that the results of the Casimir force in this sample and in previous samples are virtually indistinguishable. Furthermore, the observed differences between measured and tabulated optical properties data do not show any effect on the calculation of the Casimir interaction. We also present results of the measurement of the Casimir force between a sphere and a plane at 300, 77, 4.2 and 2.1 K. While low temperature results are noisier than room temperature ones, precluding a direct exclusion of either the Drude or the plasma model, the average of the measurements coincide at all temperatures.
机译:我们在两个金涂层表面的球面几何形状中,卡西米尔相互作用的分离依赖性描述了我们的最新结果。所有结果都是通过测量敏感微机电扭转振荡器的谐振频率随球体与平面之间的间距变化而变化而获得的。通过接近力近似,共振频率的变化在相同间隔下在两个平行板之间产生卡西米尔压力。我们介绍了室温下一个新样品的结果,该样品的介电功能已在190-825 nm范围内测量。我们表明,在该样本和以前的样本中,卡西米尔力的结果实际上是无法区分的。此外,在实测光学特性和列表光学特性数据之间观察到的差异不会对卡西米尔相互作用的计算产生任何影响。我们还介绍了球,平面在300、77、4.2和2.1 K时卡西米尔力的测量结果。尽管低温结果比室温的噪声大,但不能直接排除Drude或等离子模型,测量值的平均值在所有温度下均重合。

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