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arXiv · 2001.02455

Spin-controlled generation of indistinguishable and distinguishable photons from silicon vacancy centres in silicon carbide

Naoya Morioka·Charles Babin·Roland Nagy·Izel Gediz·Erik Hesselmeier·Di Liu·Matthew Joliffe·Matthias Niethammer·Durga Dasari·Vadim Vorobyov·Roman Kolesov·Rainer Stöhr·Jawad Ul-Hassan·Nguyen Tien Son·Takeshi Ohshima·Péter Udvarhelyi·Gergő Thiering·Adam Gali·Jörg Wrachtrup·Florian Kaiser
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Abstract

Quantum systems combining indistinguishable photon generation and spin-based quantum information processing are essential for remote quantum applications and networking. However, identification of suitable systems in scalable platforms remains a challenge. Here, we investigate the silicon vacancy centre in silicon carbide and demonstrate controlled emission of indistinguishable and distinguishable photons via coherent spin manipulation. Using strong off-resonant excitation and collecting photons from the ultra-stable zero-phonon line optical transitions, we show a two-photon interference contrast close to 90% in Hong-Ou-Mandel type experiments. Further, we exploit the system's intimate spin-photon relation to spin-control the colour and indistinguishability of consecutively emitted photons. Our results provide a deep insight into the system's spin-phonon-photon physics and underline the potential of the industrially compatible silicon carbide platform for measurement-based entanglement distribution and photonic cluster state generation. Additional coupling to quantum registers based on recently demonstrated coupled individual nuclear spins would further allow for high-level network-relevant quantum information processing, such as error correction and entanglement purification.

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Naoya Morioka, Charles Babin, Roland Nagy, Izel Gediz, Erik Hesselmeier, Di Liu, Matthew Joliffe, Matthias Niethammer, Durga Dasari, Vadim Vorobyov, Roman Kolesov, Rainer Stöhr, Jawad Ul-Hassan, Nguyen Tien Son, Takeshi Ohshima, Péter Udvarhelyi, Gergő Thiering, Adam Gali, Jörg Wrachtrup, Florian Kaiser. 2020-01-08. Spin-controlled generation of indistinguishable and distinguishable photons from silicon vacancy centres in silicon carbide. https://doi.org/10.1038/s41467-020-16330-5

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