State of the art in the determination of the fine structure constant and the ratio $h/m_{\mathrm{u}}$

Abstract

The fine structure constant $\alpha$ and the ratio $h/m_{\mathrm{u}}$ between the Planck constant and the unified atomic mass are keystone constants for the determination of other fundamental physical constants, especially the ones involved in the framework of the future International System of units. This paper presents how these two constants, which can be deduced from one another, are measured. We will present in detail the measurement of $h/m_{\mathrm{Rb}}$ performed by atomic interferometry at the Laboratoire Kastler Brossel in Paris. This type of measurement also allows a test of the standard model to be carried out with unparalleled accuracy.

arXiv admin note: text overlap with arXiv:1309.3393

References in corpus (8)

• Measurement of the fine-structure constant as a test of the Standard Model
• New determination of the fine structure constant and test of the quantum electrodynamics
• High-precision measurement of the atomic mass of the electron
• Interference-filter-stabilized external-cavity diode lasers
• Combination of Bloch oscillations with a Ramsey-Bordé interferometer : new determination of the fine structure constant
• Revised value of the eighth-order electron g-2
• Operating an atom interferometer beyond its linear range
• Bloch oscillations of ultracold atoms: a tool for a metrological determination of $h/m_{Rb}$

Cited by in corpus (1)

• Fine-Structure Constant Connects the Polarizability of Atoms and Vacuum