PIRSA:08070021

Video URL

https://pirsa.org/08070021

High accuracy 87Sr atomic lattice clock for laboratory measurements of alpha variation.

Thomsen, J. (2008). High accuracy 87Sr atomic lattice clock for laboratory measurements of alpha variation.. Perimeter Institute for Theoretical Physics. https://pirsa.org/08070021

Thomsen, Jan. High accuracy 87Sr atomic lattice clock for laboratory measurements of alpha variation.. Perimeter Institute for Theoretical Physics, Jul. 16, 2008, https://pirsa.org/08070021 

          @misc{ scivideos_PIRSA:08070021,
            doi = {10.48660/08070021},
            url = {https://pirsa.org/08070021},
            author = {Thomsen, Jan},
            keywords = {Particle Physics, Cosmology},
            language = {en},
            title = {High accuracy 87Sr atomic lattice clock for laboratory measurements of alpha variation.},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2008},
            month = {jul},
            note = {PIRSA:08070021 see, \url{https://scivideos.org/pirsa/08070021}}
          }

Jan Thomsen University of Copenhagen

Talk numberPIRSA:08070021
DOI10.48660/08070021
Source RepositoryPIRSA
Collection
Talk Type Conference
Subject

Abstract

High precision measurements in atomic and molecular systems have reached unprecedented accuracy owing to the state-of-the-art quantum control of both light and matter. We have recently completed an evaluation of the uncertainty of our 87Sr optical lattice clock at the 1x10e-16 fractional level, surpassing the best current evaluations of Cs primary standards. By analyzing worldwide measurements of the absolute frequency of the clock transitions in Sr, we constrain temporal variations of fundamental physical constants as well as their possible couplings to the gravitational potential. We will report the latest results on our 87Sr optical atomic clock, as well as the use of the Sr system to constrain variations of the fine-structure constant.