Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network
- URL: http://arxiv.org/abs/2310.01316v2
- Date: Wed, 15 May 2024 19:34:12 GMT
- Title: Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network
- Authors: Can M. Knaut, Aziza Suleymanzade, Yan-Cheng Wei, Daniel R. Assumpcao, Pieter-Jan Stas, Yan Qi Huan, Bartholomeus Machielse, Erik N. Knall, Madison Sutula, Gefen Baranes, Neil Sinclair, Chawina De-Eknamkul, David S. Levonian, Mihir K. Bhaskar, Hongkun Park, Marko Lončar, Mikhail D. Lukin,
- Abstract summary: 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.
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.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: 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.
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