Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 31: Quantum Gases: Opt. Lattice 2

Q 31.6: Talk

Wednesday, March 16, 2011, 15:45–16:00, HSZ 02

Resonance fluorescence as a precision test for single site addressability — •Peter Degenfeld-Schonburg, Martin Kiffner, and Michael Hartmann — Technische Universität München, Physik Department, James Franck Strasse, 85748 Garching, Germany

Pioneering methods in recent optical lattice experiments allow for addressing single atoms in individual sites of an optical lattice by focused laser beams. Inspired by this, we examine the resonance fluorescence spectrum of two-level atoms positioned in adjacent lattice sites, where a focused laser beam drives a single atom only. As compared to the case where the laser hits several atoms, the spectrum for single site addressing is no longer symmetric around the laser frequency. The shape of the spectrum of fluorescent light can therefore serve as a test for the precision of single site addressing. The effects we find can be attributed to a dipole-dipole interaction between the atoms due to mutual exchange of photons.