Robust quantum memory in a trapped-ion quantum network node
Physical Review Letters American Physical Society 130 (2023) 090803
Abstract:
We integrate a long-lived memory qubit into a mixed-species trapped-ion quantum network node. Ion-photon entanglement first generated with a network qubit in 88Sr+ is transferred to 43Ca+ with 0.977(7) fidelity, and mapped to a robust memory qubit. We then entangle the network qubit with another photon, which does not affect the memory qubit. We perform quantum state tomography to show that the fidelity of ion-photon entanglement decays ∼ 70 times slower on the memory qubit. Dynamical decoupling further extends the storage time; we measure an ion-photon entanglement fidelity of 0.81(4) after 10 s.Sinara and ARTIQ: Open-Source Ion-Trapping Control System
Institute of Electrical and Electronics Engineers (IEEE) 02 (2023) 294-295
Entanglement-enhanced frequency comparison of two optical atomic clocks
European Quantum Electronics Conference, EQEC 2023 in Proceedings Conference on Lasers and Electro-Optics/Europe, CLEO/Europe 2023 and European Quantum Electronics Conference EQEC 2023, Part of Conference on Lasers and Electro-Optics/Europe, CLEO/Europe 2 (2023)
Sampler – Open-Source Data Acquisition Module for Quantum Physics
International Journal of Electronics and Telecommunications Polish Academy of Sciences Chancellery (2022) 761-766-761-766
Robust quantum memory in a trapped-ion quantum network node
(2022)