Deterministic photon source of genuine three-qubit entanglement
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2023
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| _version_ | 1866914942273191936 |
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| author | Meng, Yijian Chan, Ming Lai Nielsen, Rasmus B. Appel, Martin H. Liu, Zhe Wang, Ying Bart, Nikolai Wieck, Andreas D. Ludwig, Arne Midolo, Leonardo Tiranov, Alexey Sørensen, Anders S. Lodahl, Peter |
| author_facet | Meng, Yijian Chan, Ming Lai Nielsen, Rasmus B. Appel, Martin H. Liu, Zhe Wang, Ying Bart, Nikolai Wieck, Andreas D. Ludwig, Arne Midolo, Leonardo Tiranov, Alexey Sørensen, Anders S. Lodahl, Peter |
| contents | Deterministic photon sources allow long-term advancements in quantum optics. A single quantum emitter embedded in a photonic resonator or waveguide may be triggered to emit one photon at a time into a desired optical mode. By coherently controlling a single spin in the emitter, multi-photon entanglement can be realized. We demonstrate a deterministic source of three-qubit entanglement based on a single electron spin trapped in a quantum dot embedded in a planar nanophotonic waveguide. We implement nuclear spin narrowing to increase the spin dephasing time to $T_2^* \simeq 33$ ns, which enables high-fidelity coherent optical spin rotations, and realize a spin-echo pulse sequence for sequential generation of high-fidelity spin-photon and spin-photon-photon entanglement. The emitted photons are highly indistinguishable, which is a key requirement for subsequent photon fusions to realize larger entangled states. This work presents a scalable deterministic source of multi-photon entanglement with a clear pathway for further improvements, offering promising applications in photonic quantum computing or quantum networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_12038 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Deterministic photon source of genuine three-qubit entanglement Meng, Yijian Chan, Ming Lai Nielsen, Rasmus B. Appel, Martin H. Liu, Zhe Wang, Ying Bart, Nikolai Wieck, Andreas D. Ludwig, Arne Midolo, Leonardo Tiranov, Alexey Sørensen, Anders S. Lodahl, Peter Quantum Physics Deterministic photon sources allow long-term advancements in quantum optics. A single quantum emitter embedded in a photonic resonator or waveguide may be triggered to emit one photon at a time into a desired optical mode. By coherently controlling a single spin in the emitter, multi-photon entanglement can be realized. We demonstrate a deterministic source of three-qubit entanglement based on a single electron spin trapped in a quantum dot embedded in a planar nanophotonic waveguide. We implement nuclear spin narrowing to increase the spin dephasing time to $T_2^* \simeq 33$ ns, which enables high-fidelity coherent optical spin rotations, and realize a spin-echo pulse sequence for sequential generation of high-fidelity spin-photon and spin-photon-photon entanglement. The emitted photons are highly indistinguishable, which is a key requirement for subsequent photon fusions to realize larger entangled states. This work presents a scalable deterministic source of multi-photon entanglement with a clear pathway for further improvements, offering promising applications in photonic quantum computing or quantum networks. |
| title | Deterministic photon source of genuine three-qubit entanglement |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2310.12038 |