Berlin 2005 – wissenschaftliches Programm

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Q: Quantenoptik und Photonik

Q 20: Poster Fallen & Kühlung

Q 20.8: Poster

Montag, 7. März 2005, 11:00–12:30, Poster HU

Trapping and cooling of a single atom in an intracavity dipole trap. — •T. Puppe, P. Maunz, I. Schuster, A. Grothe, K. Murr, P.W.H. Pinkse und G. Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany

A single atom strongly coupled to the field mode of a small high-finesse cavity represents a fundamental system of cavity-QED. This system is well suited for fundamental studies as well as implementations of quantum information processing protocols. Most of these applications require a good control over the atomic position. Cavity cooling [1] proved capable of improving the localization of the atom [2], thereby compensating for inevitable heating due to near-resonant probing. The measurement of a well-resolved normal-mode splitting [3] documents the warranted strong coupling as required by most applications.

Here we discuss the possibility to further improve the trapping and cooling of single atoms in an intracavity dipole trap. This would cure the localized heating regions present in previous experiments and improve on the control of the Stark shift at the trap center. Introducing auxiliary blue-detuned laser beams provides additional flexibility which allows to tailor the position-dependent light forces and Stark shift.

[1] P. Horak et al., and H. Ritsch, Phys. Rev. Lett. 79, 4974 (1997); V. Vuletić and S. Chu, Phys. Rev. Lett. 84, 3787 (2000).

[2] P. Maunz, T. Puppe, I. Schuster, N. Syassen, P.W.H. Pinkse, and G. Rempe, Nature 428, 50 (2004).

[3] P. Maunz, T. Puppe, I. Schuster, N. Syassen, P.W.H. Pinkse, and G. Rempe, quant-ph/0406136.