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Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 25: Quantum Information: Quantum Computation II

Q 25.5: Talk

Tuesday, March 24, 2015, 15:30–15:45, C/HSO

Coherent optical access to spin in the negative silicon vacancy centre in diamond — •Mathias H. Metsch1, Lachlan J. Rogers1, Kay D. Jahnke1, Alp Sipahigil2, Jan M. Binder1, Tokuyuki Teraji3, Hitoshi Sumiya4, Junichi Isoya5, Mikhail D. Lukin2, Philip Hemmer6, and Fedor Jelezko11Institute for Quantum Optics, University of Ulm, D-89081 Germany — 2Department of Physics, Harvard University, 17 Oxford Street, Cambridge, MA 02138, USA — 3National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan — 4Advanced Materials R&D Laboratories, Sumitomo Electric Industries Ltd., Itami, Hyogo 664-0016, Japan — 5Research Center for Knowledge Communities, University of Tsukuba, 1-2 Kasuga, Tsukuba, Ibaraki 305-8550, Japan — 6Electrical & Computer Engineering Department, Texas A&M University, College Station, TX 77843, USA

The silicon vacancy (SIV) centre has excellent optical properties and is a promising candidate for single photon sources. It also possess degenerate spin states, and there has been considerable interest in gaining access to this as a qubit system. Here we used an external magnetic field to lift the spin degeneracy, and used resonant excitation to access the spin sub levels. We used the phenomenon of coherent population trapping to produce coherent superposition states of the electron spin. Combining the optical properties of the SIV with the ability to control spin promotes a SIV as a candidate for a wide range of quantum information applications.

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