The control of electrons at the level of the elementary charge e was demonstrated
experimentally already in the 1980s. Ever since, the production of an electrical current ef, or …

The review makes a brief overview of traditional methods of measurement of electric current
and shows in more detail relatively new types of current sensors. These include Hall sensors …

This paper gives the 1998 self-consistent set of values of the basic constants and conversion
factors of physics and chemistry recommended by the Committee on Data for Science and …

The redefinition of the SI unit of mass in terms of a fixed value of the Planck constant has
been made possible by the Kibble balance, previously known as the watt balance. Once the …

1.1. Background This article reports work carried out under the auspices of the Committee
on Data for Science and Technology (CODATA) Task Group on Fundamental Constants. 1 It …

1.1. Background This paper gives the complete 2006 CODATA self-consistent set of
recommended values of the fundamental physical constants and describes in detail the …

A detailed analysis of the most relevant sources of phase noise in an atomic interferometer
is carried out, both theoretically and experimentally. Even a short interrogation time of 100 …

The Avogadro constant links the atomic and the macroscopic properties of matter. Since the
molar Planck constant is well known via the measurement of the Rydberg constant, it is also …

This paper concerns an international research project aimed at determining the Avogadro
constant by counting the atoms in an isotopically enriched silicon crystal. The counting …

Abstract Researchers at the National Institute of Standards and Technology (NIST) have
measured the value of the Planck constant to be $\newcommand {\hres}{6.626\, 069\, 934 …