Article Synopsis
- The study focuses on silicon vacancy centers in silicon carbide as a promising platform for generating indistinguishable photons and processing quantum information.
- By manipulating spins in the system, researchers achieved nearly 90% interference contrast in photon experiments, demonstrating effective control over photon emission.
- The findings highlight silicon carbide's potential for quantum networking and applications like entanglement distribution and error correction, paving the way for advancements in quantum technology.
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Article 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 zero-phonon line photons, 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 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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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7239935 | PMC |
| http://dx.doi.org/10.1038/s41467-020-16330-5 | DOI Listing |
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