1st Joint Commission 2 and IGFS Meeting
International Symposium on
Gravity, Geoid and Height Systems 2016

September 19-23, 2016
Thessaloniki, Greece

Development of quantum clocks and quantum sensors for geophysics applications

20/09/2016 | 15:30 | Session 4: New measurement techniques

Author(s):

Yeshpal Singh

Abstract

With timekeeping being of paramount importance for modern life, much research and major scientific advances have been undertaken in the field of frequency metrology, particularly over the last few years. New Nobel-prize winning technologies have enabled a new era of atomic clocks; namely the optical clock. These have been shown to perform significantly better than the best microwave clocks reaching an inaccuracy of 1.6x10−18 [1]. At this precision, relativistic effect on earth start to become critically important and one can define the relativistic geoid at the cm level. Using such quantum sensors, one can envision having a global coordinate system. With such results being found in large lab based apparatus, the focus now has shifted to portability - to enable the accuracy of various ground based clocks to be measured, and compact autonomous performance - to enable such technologies to be tested in space. Within the UK QT initiative, we are working on building ultra precise quantum sensors for gravity: optical clocks, absolute gravimeter, gravity-gradiometer. The eco-system created by the QT Hub [2] will be vital for geophysics applications including in space. In our presentation,we will present the most recent advancements of these quantum sensors and their related applications.

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