Webinar 5: History of Internationally Recognized Colombian Time Scale & Optical Clocks

History of Internationally Recognized Colombian Time Scale UTC (INM)

Talk Abstract:
Just as every country has its own national anthem, every country designates which entity in the national territory provides the time used for activities associated with legal compliance. That time in the scientific field is called “time scale”. This talk will discuss how the Colombian time scale was developed, how it is generated and what it is used for in Colombia. Legal Time is important for the academic, scientific and industrial groups, as well as the citizens. Each group needs different levels of accuracy depending on the intended use of their event dating activities. Therefore, the achievements in establishing the Calibration and Measurement Capabilities (CMC) for the magnitude of time and frequency in Colombia over the last 13 years are presented and how these achievements are reflected in the dissemination of metrology in Colombia, being the first CMC published in the Key Comparison Database (KCDB) of the BIPM (for its French acronym, Bureau International des Poids et Mesures) in the country's history. The talk will show that the international cooperation has been a key tool for the current development of the Time and Frequency Laboratory of the National Metrology Institute of Colombia (INM) and to expand the dissemination of metrological traceability to the International System (SI) of units in the country together with proposals of further work.
Optical Clocks with Trapped Ions

Talk Abstract:
“Never measure anything but frequency” was the motto of Arthur Schawallow. Through the measurement of frequency, we can measure any other quantity and inherit, in the process, the same exactitude. By the careful determination of the perturbation of the frequency of a given oscillator, we can fully characterize its environment: the electric and magnetic fields or the mass of the particles that surround it and even observe relativistic effects. Our understanding of nature seems to be limited by our capacity to measure frequency. What are the key ingredients to building the optimal oscillator? How can we reach and break the limits of precision and accuracy?

This brief talk introduces the development of optical clocks as possible answers to these questions. Optical clocks are based on the precise and accurate interrogation of atomic transitions. These kinds of clocks work in the optical regime of the electromagnetic spectrum, meaning that they operate at transitions that oscillate at more than 400 THz with bandwidths on the sub-Hertz level, allowing us to reach accuracies up to one part in 1018 or even lower. During this talk, I will introduce the necessary elements for the development of optical clocks with trapped calcium and aluminum ions.

Видео Webinar 5: History of Internationally Recognized Colombian Time Scale & Optical Clocks канала IEEE-UFFC