University of Cambridge > Talks.cam > Special Departmental Seminars > Chasing the Eighteenth Digit: Exploring the Limits of Timekeeping

Chasing the Eighteenth Digit: Exploring the Limits of Timekeeping

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The accuracy of state-of-the-art optical frequency standards based on trapped ions is now limited by relativistic effects, principally the time dilation due to the ions’ thermal motion in the trap and uncertainty on the gravitational red shift. After a brief introduction to timekeeping and optical frequency standards in general, I will discuss the potential of clocks to serve as gravitational potential sensors, new laser-cooling techniques to help control motional time-dilation shifts in ion traps at the level required for such relativistic geodesy, and the role that quantum entanglement may play in enhancing the performance of the next generation of frequency standards.

This talk is part of the Special Departmental Seminars series.

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