Spin-controlled generation of indistinguishable and distinguishable photons from silicon vacancy centres in silicon carbideShow others and affiliations
2020 (English)In: Nature Communications, E-ISSN 2041-1723, Vol. 11, no 1Article in journal (Refereed) Published
Abstract [en]
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.
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NATURE PUBLISHING GROUP , 2020. Vol. 11, no 1
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Identifiers
URN: urn:nbn:se:liu:diva-166480DOI: 10.1038/s41467-020-16330-5ISI: 000537058800002PubMedID: 32433556OAI: oai:DiVA.org:liu-166480DiVA, id: diva2:1444136
Note
Funding Agencies|European Research Council (ERC)European Research Council (ERC); European Commission Marie Curie ETN "QuSCo" [765267]; Max Planck SocietyMax Planck SocietyFoundation CELLEX; Humboldt FoundationAlexander von Humboldt Foundation; German Research FoundationGerman Research Foundation (DFG) [SPP 1601]; Carl-Zeiss-Stiftung; Swedish Research CouncilSwedish Research Council [VR 2016-04068]; Swedish Energy AgencySwedish Energy Agency [43611-1]; Knut and Alice Wallenberg FoundationKnut & Alice Wallenberg Foundation [KAW 2018.0071]; EUEuropean Union (EU) [862721]; Japan Society for the Promotion of ScienceMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of Science [JSPS KAKENHI 17H01056, 18H03770]; National Excellence Program of Quantum-Coherent Materials Project (Hungarian NKFIH) [KKP129866]; EU QuantERA Q-Magine Project [127889]; QuantERA Nanospin Project [127902]; National Quantum Technology Program [2017-1.2.1-NKP-2017-00001]
2020-06-202020-06-202023-03-28