Details

Autor(en) / Beteiligte

• Llewellyn, Daniel
• Ding Yunhong
• Faruque, Imad I
• Paesani Stefano
• Bacco Davide
• Santagati Raffaele
• Yan-Jun, Qian
• Li, Yan
• Yun-Feng, Xiao
• Huber, Marcus
• Malik Mehul
• Sinclair, Gary F
• Zhou, Xiaoqi
• Rottwitt Karsten
• O’Brien Jeremy L
• Rarity, John G
• Gong Qihuang
• Oxenlowe, Leif K
• Wang, Jianwei
• Thompson, Mark G

Titel

Chip-to-chip quantum teleportation and multi-photon entanglement in silicon

Ist Teil von

• Nature physics, 2020-02, Vol.16 (2), p.148-153

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2020

Quelle

Nature Journals Online

Beschreibungen/Notizen

• Integrated optics provides a versatile platform for quantum information processing and transceiving with photons1–8. The implementation of quantum protocols requires the capability to generate multiple high-quality single photons and process photons with multiple high-fidelity operators9–11. However, previous experimental demonstrations were faced by major challenges in realizing sufficiently high-quality multi-photon sources and multi-qubit operators in a single integrated system4–8, and fully chip-based implementations of multi-qubit quantum tasks remain a significant challenge1–3. Here, we report the demonstration of chip-to-chip quantum teleportation and genuine multipartite entanglement, the core functionalities in quantum technologies, on silicon-photonic circuitry. Four single photons with high purity and indistinguishablity are produced in an array of microresonator sources, without requiring any spectral filtering. Up to four qubits are processed in a reprogrammable linear-optic quantum circuit that facilitates Bell projection and fusion operation. The generation, processing, transceiving and measurement of multi-photon multi-qubit states are all achieved in micrometre-scale silicon chips, fabricated by the complementary metal–oxide–semiconductor process. Our work lays the groundwork for large-scale integrated photonic quantum technologies for communications and computations.Four single-photon states are generated and entangled on a single micrometre-scale silicon chip, and provide the basis for the demonstration of chip-to-chip quantum teleportation.