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Entangling distant resonant exchange qubits via circuit quantum electrodynamics



Jacob M. Taylor, Vanita Srinivasa, Charles Tahan


We investigate a hybrid quantum system consisting of spatially separated resonant exchange qubits, defined in three-electron semiconductor triple quantum dots, that are coupled via a super- conducting transmission line resonator. By analyzing three specific approaches drawn from circuit quantum electrodynamics and Hartmann-Hahn double resonance techniques for implementing resonator-mediated two-qubit entangling gates in both dispersive and resonant regimes, we show that methods for entangling superconducting qubits map directly to resonant exchange qubits. We calculate entangling gate fidelities as well as the rate of relaxation via phonons for resonant exchange qubits in silicon triple dots and show that such an implementation is particularly well-suited to achieving the strong coupling regime. Our approach combines the robustness of encoded spin qubits in silicon with the rapid and robust long-range entanglement provided by circuit QED systems.
Physical Review B


Quantum dots, superconducting resonators, circuit QED


Taylor, J. , Srinivasa, V. and Tahan, C. (2016), Entangling distant resonant exchange qubits via circuit quantum electrodynamics, Physical Review B, [online], (Accessed May 29, 2024)


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Created November 16, 2016, Updated November 10, 2018