New SI system of quantum units
Seminars
Joint BLTP Seminar
Date and Time: Tuesday, 18 February 2020, at 3:00 PM
Venue: Blokhintsev Hall (4th floor), Bogoliubov Laboratory of Theoretical Physics
Seminar topic: «New SI system of quantum units»
Speaker: Savely Karshenboym (Ludwig Maximilian University of Munich, Germany)
Abstract:
General conference on weights and measure adopted a new system of definition of the International System of units, SI. The definition came in action on May, 19, 2019. The new definition related the SI units to the numerical values of the Planck, Avogadro, and Boltzmann constants, speed of light, elementary charge, and cesium hyperfine interval. Exact numerical values of those quantities are now adopted by definition.
The definition became possible because of tremendous progress in the determination of h, κ, and α. I will speak about that progress and about the way how the SI units are realized now. I will also speak about consequences for atomic, nuclear, and particle physics.