Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network
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2023
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| author | Knaut, Can M. Suleymanzade, Aziza Wei, Yan-Cheng Assumpcao, Daniel R. Stas, Pieter-Jan Huan, Yan Qi Machielse, Bartholomeus Knall, Erik N. Sutula, Madison Baranes, Gefen Sinclair, Neil De-Eknamkul, Chawina Levonian, David S. Bhaskar, Mihir K. Park, Hongkun Lončar, Marko Lukin, Mikhail D. |
| author_facet | Knaut, Can M. Suleymanzade, Aziza Wei, Yan-Cheng Assumpcao, Daniel R. Stas, Pieter-Jan Huan, Yan Qi Machielse, Bartholomeus Knall, Erik N. Sutula, Madison Baranes, Gefen Sinclair, Neil De-Eknamkul, Chawina Levonian, David S. Bhaskar, Mihir K. Park, Hongkun Lončar, Marko Lukin, Mikhail D. |
| contents | A key challenge in realizing practical quantum networks for long-distance quantum communication involves robust entanglement between quantum memory nodes connected via fiber optical infrastructure. Here, we demonstrate a two-node quantum network composed of multi-qubit registers based on silicon-vacancy (SiV) centers in nanophotonic diamond cavities integrated with a telecommunication (telecom) fiber network. Remote entanglement is generated via the cavity-enhanced interactions between the SiV's electron spin qubits and optical photons. Serial, heralded spin-photon entangling gate operations with time-bin qubits are used for robust entanglement of separated nodes. Long-lived nuclear spin qubits are used to provide second-long entanglement storage and integrated error detection. By integrating efficient bi-directional quantum frequency conversion of photonic communication qubits to telecom frequencies (1350 nm), we demonstrate entanglement of two nuclear spin memories through 40 km spools of low-loss fiber and a 35 km long fiber loop deployed in the Boston area urban environment, representing an enabling step towards practical quantum repeaters and large-scale quantum networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_01316 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network Knaut, Can M. Suleymanzade, Aziza Wei, Yan-Cheng Assumpcao, Daniel R. Stas, Pieter-Jan Huan, Yan Qi Machielse, Bartholomeus Knall, Erik N. Sutula, Madison Baranes, Gefen Sinclair, Neil De-Eknamkul, Chawina Levonian, David S. Bhaskar, Mihir K. Park, Hongkun Lončar, Marko Lukin, Mikhail D. Quantum Physics A key challenge in realizing practical quantum networks for long-distance quantum communication involves robust entanglement between quantum memory nodes connected via fiber optical infrastructure. Here, we demonstrate a two-node quantum network composed of multi-qubit registers based on silicon-vacancy (SiV) centers in nanophotonic diamond cavities integrated with a telecommunication (telecom) fiber network. Remote entanglement is generated via the cavity-enhanced interactions between the SiV's electron spin qubits and optical photons. Serial, heralded spin-photon entangling gate operations with time-bin qubits are used for robust entanglement of separated nodes. Long-lived nuclear spin qubits are used to provide second-long entanglement storage and integrated error detection. By integrating efficient bi-directional quantum frequency conversion of photonic communication qubits to telecom frequencies (1350 nm), we demonstrate entanglement of two nuclear spin memories through 40 km spools of low-loss fiber and a 35 km long fiber loop deployed in the Boston area urban environment, representing an enabling step towards practical quantum repeaters and large-scale quantum networks. |
| title | Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2310.01316 |