Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 33: Quantum Information: Solid State Systems II
Q 33.2: Vortrag
Mittwoch, 8. März 2017, 14:45–15:00, P 3
Optical quantum memories with colour centre ensembles in diamond — •Jonas Nils Becker1, Christian Weinzetl2, Johannes Görlitz1, Eilon Poem3, Joshua Nunn2, Ian Alexander Walmsley2, and Christoph Becher1 — 1Fakultät NT (Fachrichtung Physik), Universität des Saarlandes, Campus E2.6, 66123 Saarbrücken, Germany — 2Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom — 3Weizmann Institute of Science, Rehovot 7610001, Israel
The reliable storage of a quantum state in the form of a photon without destroying its coherence properties remains a significant challenge in the field of quantum information processing. One scheme to realize such an optical quantum memory is a Raman-based storage in a dense ensemble of emitters via an off-resonant two-photon absorption of single photons, aided by a strong auxiliary control-field in a Λ-type configuration. In this scheme, the memory bandwidth is only limited by the ground state splitting of the ensemble. We here propose the use of an ensemble of silicon vacancy (SiV) colour centres in diamond as a storage medium to realize such a memory. A large ground state splitting of 48 GHz allows for storing picosecond photons over tens of nanoseconds enabling applications in e.g. deterministic single photon sources or buffer memories. We here present theoretical as well as first experimental results demonstrating the feasibility of an SiV-based memory as well as storage-time-extension using Hahn-Echo pulse sequences in inhomogeneously broadened ensembles.