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Abstract
Reliable information transmission between spatially separated nodes is fundamental to a network architecture for scalable quantum technology. Spin qubit in semiconductor quantum dots is a promising candidate for quantum information processing. However, there remains a challenge to design a practical path from the existing experiments to scalable quantum processor. Here we propose a module consisting of spin singlet-triplet qubits and single microwave photons. We show a high degree of control over interactions between the spin qubit and the quantum light field can be achieved. Furthermore, we propose preparation of a shaped single photons with an efficiency of 98%, and deterministic quantum state transfer and entanglement generation between remote nodes with a high fidelity of 90%. This spin-photon module has met the threshold of particular designed error-correction protocols, thus provides a feasible approach towards scalable quantum network architecture.
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Details
1 Chinese Academy of Sciences, Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, P.R. China (GRID:grid.9227.e) (ISNI:0000000119573309)
2 Chinese Academy of Sciences, Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, P.R. China (GRID:grid.9227.e) (ISNI:0000000119573309); University of California at Los Angeles, Department of Physics and Astronomy, California, USA (GRID:grid.19006.3e) (ISNI:0000 0000 9632 6718)
3 University of California at Los Angeles, Department of Physics and Astronomy, California, USA (GRID:grid.19006.3e) (ISNI:0000 0000 9632 6718)