Mainz 2017 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 53: Poster: Quantum Optics and Photonics III
Q 53.54: Poster
Donnerstag, 9. März 2017, 17:00–19:00, P OG2
Silicon-Vacancy Color Centers in Diamond at Millikelvin Temperatures — •Alexander Stahl1, Max Hettrich1, Mathias Metsch2, Michael Kern2, Lachlan J. Rogers2, Fedor Jelezko2, and Ferdinand Schmidt-Kaler1 — 1WA Quantum, Johannes Gutenberg - Universität Mainz — 2Institut für Quantenoptik, Universität Ulm
Color centers in diamond represent excellent qubits without the need for ultrahigh vacuum and complex lasersystems[1,2]. In particular, silicon-vacancy color centers feature very narrow optical transitions due to the conservation of the diamond crystal's inversion symmetry. This makes them excellent sources for indistinguishable photons, which can be used for entanglement distribution. However, the phonon-induced dynamic Jahn-Teller effect severely limits the ground-state spin coherence time to about 35 ns[3,4]. We are setting up an apparatus featuring a dilution refrigerator, which is able to cool a diamond sample together with a single-site resolving confocal microscope to Millikelvin temperatures, which is expected to increase that coherence time by several orders of magnitude. Possibilities for future extensions include photonic structures of the diamond around the color center for enhanced coupling and CQED applications.
[1] D. D. Awschalom et al., Science 339, 1174 (2013
[2] F. Jelezko et al., Phys. Rev. Lett. 92, 076401 (2004)
[3] L. J. Rogers et al., Phys. Rev. Lett. 113, 263602 (2014)
[4] B. Pingault et al., Phys. Rev. Lett. 113, 263601 (2014)