Related papers: Realization of a crosstalk-avoided quantum network node with dual-type qubits by the same ion species

Realization of a crosstalk-avoided quantum network node with dual-type qubits by the same ion species

URL: http://arxiv.org/abs/2306.14405v2
Date: Tue, 2 Jan 2024 10:29:52 GMT
Title: Realization of a crosstalk-avoided quantum network node with dual-type qubits by the same ion species
Authors: L. Feng, Y.-Y Huang, Y.-K. Wu, W.-X. Guo, J.-Y. Ma, H.-X. Yang, L. Zhang, Y. Wang, C.-X. Huang, C. Zhang, L. Yao, B.-X. Qi, Y.-F. Pu, Z.-C. Zhou and L.-M. Duan
Abstract summary: We generate ion photon entanglement for the $S$-qubit in a typical timescale of hundreds of milliseconds. Our work demonstrates an enabling function of the dual-type qubit scheme for scalable quantum networks.
Score: 0.20288584947488558
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Generating ion-photon entanglement is a crucial step for scalable trapped-ion quantum networks. To avoid the crosstalk on memory qubits carrying quantum information, it is common to use a different ion species for ion-photon entanglement generation such that the scattered photons are far off-resonant for the memory qubits. However, such a dual-species scheme requires elaborate control of the portion and the location of different ion species, and can be subject to inefficient sympathetic cooling. Here we demonstrate a trapped-ion quantum network node in the dual-type qubit scheme where two types of qubits are encoded in the $S$ and $F$ hyperfine structure levels of ${}^{171}\mathrm{Yb}^+$ ions. We generate ion photon entanglement for the $S$-qubit in a typical timescale of hundreds of milliseconds, and verify its small crosstalk on a nearby $F$-qubit with coherence time above seconds. Our work demonstrates an enabling function of the dual-type qubit scheme for scalable quantum networks.

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