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Q: Fachverband Quantenoptik und Photonik

Q 40: Poster: Quantum Optics and Photonics III

Q 40.15: Poster

Dienstag, 6. März 2018, 16:15–18:15, Zelt West

Towards a long lived multi-mode memory for photonic qubits — •Stefan Langenfeld, Matthias Koerber, Olivier Morin, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching, Germany

Quantum memories can preserve qubits for an extended duration. In combination with the capability to map photonic qubits into and out of the memory, this has important applications in quantum computation and communication. For instance, quantum repeater protocols rely on long storage times and the ability to access multiple qubits independently. After recently demonstrating a qubit memory featuring a coherence time compatible with global scale communication [1], we now are interested in implementing multi-qubit storage capabilities in the same system. This would promote single neutral atoms to a truly scalable architecture. Our system consists of several ⁸⁷Rb atoms trapped in a two-dimensional optical lattice in a high-finesse optical resonator. We use an imaging system capable of resolving single atoms [2]. In combination with an acousto-optic deflector this allows us to select an atom and steer an optical beam onto it independent of its non-deterministic position in the optical lattice. We will discuss our progress on the optical addressing and show first results demonstrating multi-qubit storage capabilities.

[1] M. Körber, O. Morin, S. Langenfeld et al., accepted for publication in Nat. Photonics

[2] A. Neuzner et al., Nat. Photonics 10, 303-306 (2016)