PMID: 11329313May 1, 2001Paper

Collisional frequency shifts in 133Cs fountain clocks

Physical Review Letters
P J LeoC J Williams

Abstract

We present a theoretical analysis of the density dependent frequency shift in Cs fountain clocks using the highly constrained binary collision model described by Leo et al. [Phys. Rev. Lett. 85, 2721 (2000)]. We predict a reversal in the clock shift at temperatures near 0.08 microK. Our results show that s waves dominate the collision process. However, as a consequence of the large scattering lengths in Cs the clock shift is strongly temperature dependent and does not reach a constant Wigner-law value until temperatures are less than 0.1 nK.

References

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Citations

Apr 18, 2009·Science·G K CampbellA D Ludlow
Oct 19, 2007·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·K SzymaniecR Wynands
Mar 15, 2002·Nature·Keith BurnettCarl J Williams
May 16, 2007·Physical Review Letters·K SzymaniecR Wynands
May 21, 2005·Physical Review Letters·Tetsuya IdoJun Ye
Dec 18, 2002·Physical Review Letters·F Pereira Dos SantosC Salomon

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