



01399nas a2200157   4500008004100000245008400041210006900125260001500194300001100209490000700220520091600227100001801143700001901161700001401180856004701194       2016                        eng d00aEntangling distant resonant exchange qubits via circuit quantum electrodynamics0 aEntangling distant resonant exchange qubits via circuit quantum   c2016/11/16  a2054210 v943 a<p>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 superconducting transmission line resonator. Drawing on methods from circuit quantum electrodynamics and Hartmann-Hahn double resonance techniques, we analyze three specific approaches for implementing resonator-mediated two-qubit entangling gates in both dispersive and resonant regimes of interaction. 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 favorable coherence properties of encoded spin qubits in silicon with the rapid and robust long-range entanglement provided by circuit QED systems.</p>1 aSrinivasa, V.1 aTaylor, J., M.1 aTahan, C.  uhttps://doi.org/10.1103/PhysRevB.94.205421