Freiburg 2019 – scientific programme

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FM: Fall Meeting

FM 77: Quantum Networks: Platforms and Components II

FM 77.2: Talk

Thursday, September 26, 2019, 14:30–14:45, 1098

Quantum Information Applications with Single Defect Centers in 4H-SiC — •Florian Kaiser, Naoya Morioka, Roland Nagy, Matthias Niethammer, Izel Gediz, Erik Hesselmeier, Charles Babin, Matthias Widmann, Yu-Chen Chen, Roman Kolesov, Rainer Stöhr, and Jörg Wrachtrup — 3rd Institute of Physics, University of Stuttgart and IQST, Stuttgart, Germany

Silicon carbide (SiC) is the gold standard material for high power electronics thanks to outstanding thermal conductivity, breakdown voltage, and a large bandgap energy.

Recently, the SiC platform has also been identified to be very promising for quantum information distribution tasks [1]. In this regard, a critical requirement is stable optical emission of indistinguishable photons through which multiple spintronics systems can be reliably entangled via optical interference [2].

Here, we will show our recent efforts in measuring two-photon indistinguishability of single V1 centres in 4H-SiC via Hong, Ou and Mandel interference. Our results show that the V1 centre in 4H-SiC is a prime candidate for realising memory-assisted quantum network applications using semiconductor-based spin-to-photon interfaces and coherently coupled electron/nuclear spins.

We will additionally discuss near-term reachable network scenarios, and achievable performance parameters.

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

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