Proposal for new experimental schemes to realize the Avogadro constant

Abstract

We propose two experimental schemes to determine and so to realize the Avogadro constant $N\_A$ at the level of 10${}^{-7}$ or better with a watt balance experiment and a cold atom experiment measuring $h/m(X)$ (where $h$ is the Planck constant and $m(X)$ the mass of the atom $X$). We give some prospects about achievable uncertainties and we discuss the opportunity to test the existence of possible unknown correction factors for the Josephson effect and quantum Hall effect.

References in corpus (4)

• Long-lived Bloch oscillations with bosonic Sr atoms and application to gravity measurement at micrometer scale
• A new determination of the fine structure constant based on Bloch oscillations of ultracold atoms in a vertical optical lattic
• Bloch oscillations of ultracold atoms: a tool for a metrological determination of $h/m_{Rb}$
• A promising method for the measurement of the local acceleration of gravity using Bloch oscillations of ultracold atoms in a vertical standing wave

Cited by in corpus (1)

• State of the art in the determination of the fine structure constant: test of Quantum Electrodynamics and determination of h/mu