Klaus v. Klitzing, Max Planck Institute
October 14, 2014

The quantized Hall resistance (Nobel Prize 1985) plays a crucial role for the implementation of a new international system of units (SI units) since this quantum resistance can be used not only for high precision realizations of electrical standards on the basis of fundamental constants but also for a new realization of a kilogram by comparing electrical and mechanical forces with the Watt balance. The talk gives an overview about the development of our present SI system and summarizes the application of the quantum Hall effect in metrology (science of measurements) with the focus on the replacement of the kilogram by a fixed value for the Planck constant.

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