Leo, P.
, Julienne, P.
, Mies, F.
and Williams, C.
(2001),
Collisional Frequency Shifts in <sup>133</sup>Cs Fountain Clocks, Physical Review Letters
(Accessed May 31, 2025)
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Collisional Frequency Shifts in 133Cs Fountain Clocks
Published
Author(s)
, , ,
Abstract
We present a theoretical analysis of the pressure shift in Cs fountain clocks using the highly constrained binary collision model described by Leo et al. [Phys. Rev. Lett. xx, xx (2000)]. We predict a reversal in the pressure shift at temperatures near 0.08 K which could allow elimination of a large source of uncertainty in the Cs fountain clock. Our results show that s-waves dominate the collision process however as a consequence of the large scattering lengths in Cs the pressure shift is strongly temperature dependent and does not reach a constant Wigner-law value until temperatures are less than 0.1 nK.Citation
Physical Review Letters
Volume
86
Issue
No. 17
Pub Type
Journals
Keywords
cesium, clock shift, fountain clock, ultracold scattering
Citation
Issues
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Created April 1, 2001, Updated February 17, 2017