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14 September 2020 – 17 September 2020 OSA Virtual Event - Eastern Daylight Time (UTC - 04:00)

Clocks and Interferometry (QW4A)

Presider: Paul Kwait, University of Illinois

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13:45 - 14:15
(UTC - 04:00)

Transportable Optical Lattice Clocks to Test Gravitational Redshift (QW4A.2)
Presenter: Hidetoshi Katori, University of Tokyo

We developed a pair of transportable optical lattice clocks and conducted an 18-digit-precision frequency comparison in a broadcasting tower to give a height difference of 450 m, which tested the gravitational redshift at 10-5 level.

Authors:Hidetoshi Katori, University of Tokyo

  Paper

14:15 - 14:45
(UTC - 04:00)

Quantum Sensors Out of the Lab : from GPS Free Navigation to Tests of Gravitation (QW4A.3)
Presenter: Philippe Bouyer, Institut d'Optique - CNRS

The remarkable success of atom coherent manipulation techniques has motivated competitive research and development in precision metrology. Matter-wave inertial sensors – accelerometers, gyrometers, gravimeters – based on these techniques are all at the forefront of their respective measurement classes. Atom inertial sensors provide nowadays about the best accelerometers and gravimeters and allow, for instance, to make the most precise monitoring of gravity or to device precise tests of the weak equivalence principle (WEP). They also offer promising solutions for a new generation of navigations systems that will not rely solely on GPS accuracy. I present here some recent advances in these fields.

Authors:Philippe Bouyer, Institut d'Optique - CNRS