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Q: Fachverband Quantenoptik und Photonik

Q 43: QI Poster II (joint session QI/Q)

Q 43.59: Poster

Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof

Towards optical tweezer arrays for cavity based quantum information processing — •Matthias Seubert, Lukas Hartung, Stephan Welte, Emanuele Distante, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany

In recent decades, single neutral atoms in a strongly coupled optical resonator have developed to a powerful tool for quantum information processing and network application [1]. Increasing the number of individually controllable atoms in this platform provides the possibility to increase the efficiency of existing protocols by multiplexing, and additionally opens the way towards novel information processing and network protocols. However, this requires precise control of the atom position within the cavity mode which is a challenging demand.

Here, we show the implementation of a tweezer setup, capable of positioning atoms within an optical cavity, using a 2D acousto-optic deflector. ⁸⁷Rb atoms are first loaded at the center of the cavity, then transferred into optical tweezers and finally repositioned at sub-wavelength precision. In this manner, tweezer arrays allow one to load a deterministic number of atoms and to move individual atoms from a strongly coupled to a non-coupled position. In the future, this setup offers the possibility to address individual atoms, detect or rotate their state and generate single atom-photon entanglement.

[1] A. Reiserer and G. Rempe, Rev. Mod. Phys. 87, 1379 (2015)