Darmstadt 2008 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 28: Poster Quanteninformation

Q 28.18: Poster

Dienstag, 11. März 2008, 16:30–19:00, Poster C2

Cooling, storing, and manipulating single atoms in an optical cavity — •Jörg Bochmann, Martin Mücke, David Moehring, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany

Single atoms coupled to high finesse cavities provide unique systems to study light-matter interactions in the quantum regime. Deterministic generation of single photons and application as a single photon server has been demonstrated [1]. Naturally, these systems are well suited for generation of entangled states between atoms and photons [2].

Efficient operation of these experiments relies on cavity-mediated cooling of the atom within the cavity mode [3]. In our new setup, we reliably trap and cool Rb atoms in a cavity using a 2D-optical lattice of far detuned dipole traps. The cavity parameters put the system at the boundary of the strong coupling regime and we have observed constant coupling of atoms to the cavity over many seconds. Photons generated inside the cavity are outcoupled to an optical fiber and transmitted to a detection setup with ca. 50% efficiency. Improvements regarding a 3D-dipole trap configuration and fast photon generation schemes are in progress.

[1] M. Hijlkema, et al., Nature Physics 3, 253 (2007)

[2] T. Wilk, et al., Science 317, 488 (2007)

[3] S. Nußmann, et al., Nature Physics 1, 122 (2005)