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Optical Atomic Clocks for Ground and Space Applications

F. Riehle

cospJan 1, 20100 citations

Optical Atomic Clock Technology for Space Applications

Markus P. Plattner, K. Kemmerle, Timo Stuffler

cospJan 1, 20100 citations

Optical Atomic Clock for Fundamental Physics and Precision Metrology in Space

Jason Williams, Thanh Le, Sascha Kulas +1 more

Bulletin of the American Physical SocietyJun 7, 20170 citations

Atom interferometers and optical atomic clocks: New quantum sensors for fundamental physics experiments in space

Guglielmo Maria Tino, L. Cacciapuoti, Kai Bongs +18 more

Nuclear Physics B - Proceedings SupplementsMar 9, 200752 citations

Ultrastable Free-Space Laser Links for a Global Network of Optical Atomic Clocks

David R. Gozzard, L. A. Howard, Benjamin P. Dix-Matthews +3 more

A global network of optical atomic clocks will enable unprecedented measurement precision in fields including tests of fundamental physics, dark matter searches, geodesy, and navigation. Free-space laser links through the turbulent atmosphere are needed to fully exploit this global network, by enabling comparisons to airborne and spaceborne clocks. We demonstrate frequency transfer over a 2.4 km atmospheric link with turbulence comparable to that of a ground-to-space link, achieving a fractional frequency stability of 6.1×10^{-21} in 300 s of integration time. We also show that clock comparison between ground and low Earth orbit will be limited by the stability of the clocks themselves after only a few seconds of integration. This significantly advances the technologies needed to realize a global timescale network of optical atomic clocks.A global network of optical atomic clocks will enable unprecedented measurement precision in fields including tests of fundamental physics, dark matter searches, geodesy, and navigation. Free-space laser links through the turbulent atmosphere are needed to fully exploit this global network, by enabling comparisons to airborne and spaceborne clocks. We demonstrate frequency transfer over a 2.4 km atmospheric link with turbulence comparable to that of a ground-to-space link, achieving a fractional frequency stability of 6.1×10^{-21} in 300 s of integration time. We also show that clock comparison between ground and low Earth orbit will be limited by the stability of the clocks themselves after only a few seconds of integration. This significantly advances the technologies needed to realize a global timescale network of optical atomic clocks.

arXiv:2103.12909Physical Review LettersJan 14, 202257 citations

An Optical Link for the ACES and STE-QUEST Missions in Western Australia

Sascha Schediwy

Western Australia is becoming the premier southern hemisphere hub for high-precision ground-space timing missions. The University of Western Australia (UWA) is currently building a state-of-the-art optical atomic clock, and has been selected as the only southern hemisphere microwave-frequency ground station for the Atomic Clock Ensemble in Space (ACES) mission. We propose to construct a 60 km section of optical fibre to complete a link between UWA and the Yarragadee Satellite Laser Ranging facility and thereby enabling an optical link for the ACES and Space-Time Explorer and QUantum Equivalence Principle Space Test (STE-QUEST) missions.Western Australia is becoming the premier southern hemisphere hub for high-precision ground-space timing missions. The University of Western Australia (UWA) is currently building a state-of-the-art optical atomic clock, and has been selected as the only southern hemisphere microwave-frequency ground station for the Atomic Clock Ensemble in Space (ACES) mission. We propose to construct a 60 km section of optical fibre to complete a link between UWA and the Yarragadee Satellite Laser Ranging facility and thereby enabling an optical link for the ACES and Space-Time Explorer and QUantum Equivalence Principle Space Test (STE-QUEST) missions.

May 22, 20130 citations

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