Hannover 2020 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 41: Quantum Information (Quantum Communication and Quantum Repeater) I

Q 41.4: Talk

Thursday, March 12, 2020, 12:00–12:15, e001

Spin-controlled indistinguishable and distinguishable photon emission from colour centres in silicon carbide — •Florian Kaiser, Naoya Morioka, Roland Nagy, Izel Gediz, Erik Hesselmeier, Charles Babin, Matthias Niethammer, Roman Kolesov, Durga Dasari, Rainer Stöhr, and Jörg Wrachtrup — 3rd Institute of Physics, University of Stuttgart and IQST, Stuttgart, Germany

The silicon carbide (SiC) platform has recently shown extremely promising advancements for scalable quantum information applications [1]. To foster the platform's full potential, entanglement generation is crucial, which may be efficiently mediated through photonic interference [2].

Here, we show that the silicon vacancy (VSi) centre in SiC provides the necessary spin-optical interface. First, we show high quality Hong-Ou-Mandel interference experiments. Then, we show how we control the photonic interference pattern via coherent electron spin control.

Our results clearly demonstrate that VSi centres in SiC are capable of generating photon-mediated spin-spin entanglement. This crucial step demonstrates the potential of the system for realising large-scale quantum networks.

[1] R. Nagy et al., Nat. Commun. 10, 1954 (2019)

[2] F. Rozpedek et al., Phys. Rev. A 99, 052330 (2019)