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Q: Fachverband Quantenoptik und Photonik

Q 21: Poster I

Q 21.53: Poster

Dienstag, 9. März 2010, 16:00–19:00, Lichthof

Atom-Photon-Interfaces - Single-Photon Generation and Shaping — •Peter Nisbet¹, Jerome Dilley¹, Gunnar Langfahl-Klabes¹, Genko Vasilev², Daniel Ljunggren³, and Axel Kuhn¹ — ¹Clarendon Laboratory, Oxford, UK — ²Dept. of Phys., Sofia University, Bulgaria — ³Dept. of Appl. Physics, KTH Stockholm, Sweden

Single atoms coupled to high-finesse cavities provide a unique way to deterministically generate a stream of single photons of MHz bandwidth [1]. Atom-cavity schemes are also in principle reversible, this would allow quantum state mapping between static (atom-cavity) and flying (photon) qubits which could be scaled up into a quantum network.

We report on the latest status of a strong coupling atom-cavity system based on ⁸⁷Rb. Atoms are loaded into the cavity (F=125000, L=90 µ m) using an atomic fountain which gives rise to millisecond interaction times.

We also show a tweak to deliver single photons of arbitrary temporal shape. For any possible shape we derive an analytic expression for the driving laser pulse [2].
[1] Hijlkema, M. et al. Nature Physics 3, 253 (2007)

[2] Vasilev, G. et al. arXiv:0907.0761v1