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Cancellation of the collisional frequency shift in caesium fountain clocks
K. Szymaniec, W. Chalupczak, E. Tiesinga +3
We have observed that the collisional frequency shift in primary caesium fountain clocks varies with the clock state population composition and, in particular, is zero for a given…
Light forces in ultracold photoassociation
E. Gomez, A. T. Black, L. D. Turner +2
We study the time-resolved photoassociation of ultracold sodium in an optical dipole trap. The photoassociation laser excites pairs of atoms to molecular states of large total angu…
Effective-range description of a Bose gas under strong one- or two-dimensional confinement
Pascal Naidon, Eite Tiesinga, William F. Mitchell +1
We point out that theories describing s-wave collisions of bosonic atoms confined in one- or two-dimensional geometries can be extended to much tighter confinements than previously…