Signatures of single site addressability in resonance fluorescence spectra

Details Signatures of single site addressability in resonance fluorescence spectra Signatures of single site addressability in resonance fluorescence spectra

2011-11-23

arxiv.org/abs/1111.5494v1

Phys. Rev. A 85, 013842 (2012)

Physics

Quantum Physics

9 Pages, 4 figures

Scientific paper

10.1103/PhysRevA.85.013842

Pioneering methods in recent optical lattice experiments allow to focus laser beams down to a spot size that is comparable to the lattice constant. Inspired by this achievement, we examine the resonance fluorescence spectra of two-level atoms positioned in adjacent lattice sites and compare the case where the laser hits only one atom (single site addressing) with cases where several atoms are illuminated. In contrast 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 single site addressing. The effects we find can be attributed to a dipole-dipole interaction between the atoms due to mutual exchange of photons.

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