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

• URL: http://arxiv.org/abs/2001.02455v2
• Date: Fri, 10 Jan 2020 09:52:58 GMT
• Title: Spin-controlled generation of indistinguishable and distinguishable photons from silicon vacancy centres in silicon carbide
• Authors: Naoya Morioka, Charles Babin, Roland Nagy, Izel Gediz, Erik Hesselmeier, Di Liu, Matthew Joliffe, Matthias Niethammer, Durga Dasari, Vadim Vorobyov, Roman Kolesov, Rainer St\"ohr, Jawad Ul-Hassan, Nguyen Tien Son, Takeshi Ohshima, P\'eter Udvarhelyi, Gerg\H{o} Thiering, Adam Gali, J\"org Wrachtrup, Florian Kaiser
• Abstract summary: Quantum systems combining indistinguishable photon generation and spin-based quantum information processing are essential for remote quantum applications and networking. Here, we demonstrate controlled emission of indistinguishable and distinguishable photons via coherent spin manipulation. We exploit the system's intimate spin-photon relation to spin-control the colour and indistinguishability of consecutively emitted photons.
• Score: 1.3428816436609148
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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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