Optical ferris wheel for ultracold atoms

Details Optical ferris wheel for ultracold atoms Optical ferris wheel for ultracold atoms

2006-11-15

arxiv.org/abs/physics/0611154v1

Optics Express 15, 8619 (2007).

Physics

Optics

4 pages, 4 figures

Scientific paper

10.1364/OE.15.008619

We propose a versatile optical ring lattice suitable for trapping cold and quantum degenerate atomic samples at discrete angular positions. We demonstrate the realisation of intensity patterns generated from Laguerre-Gauss ($\exp(i \ell\theta)$) modes with different $\ell$ indices. The ring lattice can have either intensity maxima or minima, suitable for trapping in red or blue detuned light, and it can be rotated by introducing a frequency shift between the Laguerre Gauss modes. The potential wells can be joined to form a uniform ring trap, making it ideal for studying persistent currents and the Mott insulator transition in a ring geometry.

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