Projects per year
Clocks based on cold atoms offer unbeatable accuracy and long-term stability, but their use in portable quantum technologies is hampered by a large physical footprint. Here, we use the compact optical layout of a grating magneto-optical trap (gMOT) for a precise frequency reference. The gMOT collects 10 7 87Rb atoms, which are subsequently cooled to 20 µK in optical molasses. We optically probe the microwave atomic ground-state splitting using lin┴lin polarised coherent population trapping and a Raman-Ramsey sequence. With ballistic drop distances of only 0.5 mm, the measured short-term fractional frequency stability is 2 × 10 −11/√τ.
- cold atoms
- quantum technologies
- grating magneto-optical trap
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- 2 Finished
1/12/14 → 30/11/19
1/10/14 → 31/03/18
Project: Research - Studentship
Elvin, R. (Creator), Arnold, A. (Contributor), Griffin, P. (Contributor), Hoth, G. (Contributor), Riis, E. (Contributor), McGilligan, J. P. (Contributor), Wright, M. (Contributor) & Lewis, B. (Contributor), University of Strathclyde, 16 Dec 2019