Hannover 2003 – wissenschaftliches Programm

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Q: Quantenoptik

Q 19: Fallen und Kühlung 2

Q 19.2: Vortrag

Dienstag, 25. März 2003, 14:15–14:30, F303

Towards Deterministic Control of Atom-Cavity Coupling — •S.  Nußmann, M. Hijlkema, B. Weber, F. Rohde, A. Kuhn, and G. Rempe — Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany

Cavity QED is an interesting testing ground to study basic phenomena of quantum mechanics and finds applications in quantum information processing. Recently, we have demonstrated an atom-cavity system that acts as a deterministic single-photon source [1,2]. The only practical limitation of this setup comes from the atoms, which are falling through the cavity. This leads to randomly distributed atom-cavity interaction-time intervals of short duration. Therefore, we conceived a new setup with the goal to increase the control over the atom(s) in the optical cavity, using atom-cooling and trapping techniques. Starting from a magneto-optical trap (MOT), atoms are loaded into a dipole trap which runs horizontally and is oriented perpendicular to the cavity axis with the focus between MOT and cavity. Atoms oscillate in this trap, and as they reach the cavity location after half a period, they are loaded into a tightly focused standing-wave dipole trap [3] with its focus in the cavity. With this scheme, it should be possible to create a register of single atoms, each trapped in a single potential well. We will present first results demonstrating the atom transport, and we will discuss ideas on subsequent cooling of the atoms.

[1] A. Kuhn, M. Hennrich and G. Rempe, PRL 89, 067901 (2002).

[2] M. Hennrich et al., PRL 85, 4872-4875 (2000).

[3] S. Kuhr et al., Science, 293, 278 (2001).