Lasers, Cold Atoms and Atomic Clocks: Realizing the Second Today
Istituto Nazionale di Ricerca Metrologica (INRIM), Optics Department, Strada delle Cacce 91, 10135 Torino, Italia
Published online: 5 September 2013
The time is the physical quantity that mankind could measure with the best accuracy, thanks to the properties of the atomic physics, as the present definition of time is based on atomic energy transitions. This short review gives some basic information on the heart of the measurement of time in the contemporary world, i.e. the atomic clocks, and some trends related.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.