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A: Fachverband Atomphysik
A 15: Poster I
A 15.56: Poster
Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster
Towards single lattice site addressability using ultracold Rydberg atoms — •Ulrich Raitzsch1, Richard Abel1, Ashok Mohapatra1,2, Mark Bason1, Jonathan Pritchard1, Kevin Weatherill1, and Charles Adams1 — 1Atomic & Molecular Physics, Durham, U.K. — 25. Physikalisches Institut, Universität Stuttgart, Germany
We present our recent progress towards single lattice site addressability using Rydberg atoms. The large polarisability α of Rydberg states makes it possible to selectively excite atoms at a single lattice site into a Rydberg state using electric field gradients. In our experimental scheme the atoms are loaded from a magneto-optical trap into a one-dimensional lattice with ∼ 600 nm lattice constant. A Rydberg state with a principal quantum number n=70 can be addressed by a moderate electric field gradient. Using a novel scheme for laser locking to any excited state transition, we demonstrate a combined two-photon excitation linewidth to the Rydberg state of ≤ 200 kHz [1], which is sufficiently small to exclusively address a single lattice site.
[1] R. Abel et al., arXiv:0811.2183v1 (2008)