Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Optics II
Q 11.5: Vortrag
Montag, 6. März 2017, 18:00–18:15, P 5
Demonstration of a low-noise quantum memory in Cs vapour — Krzysztof T. Kaczmarek, Patrick M. Ledingham, •Benjamin Brecht, Sarah Thomas, Joseph H. D. Munns, Amir Feizpour, Dylan J. Saunders, Joshua Nunn, and Ian A. Walmsley — Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom
Quantum memories will play a pivotal role in the realization of large-scale quantum networks. In such architectures, they will serve as both active and passive network nodes.
Here, we realise a quantum memory in warm atomic Caesium vapour. Our memory is based on a so-called ladder protocol, which combines low-noise operation with outstanding experimental simplicity. We demonstrate the storage and retrieval of heralded single photons from a parametric down-conversion source. Both the stored and retrieved photons feature a heralded g(2)(0) correlation of less than 0.5, which verifies the successful memory operation.