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Spin-controlled generation of indistinguishable and distinguishable photons from silicon vacancy centres in silicon carbide
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- Morioka, Naoya (författare)
- Univ Stuttgart, Germany; Inst Quantum Sci and Technol IQST, Germany; DENSO CORP, Japan
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- Babin, Charles (författare)
- Univ Stuttgart, Germany; Inst Quantum Sci and Technol IQST, Germany
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- Nagy, Roland (författare)
- Univ Stuttgart, Germany; Inst Quantum Sci and Technol IQST, Germany
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- 2020-05-20
- 2020
- Engelska.
- Ingår i: Nature Communications. - : NATURE PUBLISHING GROUP. - 2041-1723. ; 11:1
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- 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 zero-phonon line photons, we show a two-photon interference contrast close to 90% in Hong-Ou-Mandel type experiments. Further, we exploit the systems intimate spin-photon relation to spin-control the colour and indistinguishability of consecutively emitted photons. Our results provide a deep insight into the systems 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 individual nuclear spins would further allow for high-level network-relevant quantum information processing, such as error correction and entanglement purification. Defects in silicon carbide can act as single photon sources that also have the benefit of a host material that is already used in electronic devices. Here the authors demonstrate that they can control the distinguishability of the emitted photons by changing the defect spin state.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
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