Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 31: Poster: Quantum Optics and Photonics I

Q 31.51: Poster

Dienstag, 7. März 2017, 17:00–19:00, P OG1+2

Towards single neutral atoms in crossed fiber cavities — •Dominik Niemietz, Manuel Brekenfeld, Joseph Dale Christesen, Stephan Ritter, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany

Cavity quantum electrodynamics provides a rich toolbox for the investigation of fundamental phenomena in quantum physics with intriguing applications in quantum information processing. The coupling rate between the cavity light mode and a single emitter, e.g., a neutral atom trapped in the cavity, is inversely proportional to the square root of the mode volume. Limits imposed by traditional manufacturing processes of the cavity mirrors were overcome with the introduction of fiber cavities [1], where fiber end facets are machined by means of CO₂ laser ablation. Besides small mode volumes and therefore larger coupling rates, fiber cavities also allow for new cavity geometries due to their smaller dimensions. We are currently setting up a new apparatus consisting of two crossed fiber cavities, coupling independently two light modes to one single atom. This constitutes an important step towards the realization of a spatially and functionally integrated quantum repeater [2]. We will present the current status and future plans for our apparatus including fabrication results of elliptical and spherical fiber mirrors.

[1] D. Hunger et al., New J. Phys. 12, 065038 (2010)

[2] M. Uphoff et al., Appl. Phys. B 122, 46 (2016)