TY - JOUR T1 - Input-output theory for spin-photon coupling in Si double quantum dots JF - Physical Review B Y1 - 2017 A1 - Benito, M. A1 - Mi, X. A1 - J. M. Taylor A1 - Petta, J. R. A1 - Burkard, Guido AB -
The interaction of qubits via microwave frequency photons enables long-distance qubit-qubit coupling and facilitates the realization of a large-scale quantum processor. However, qubits based on electron spins in semiconductor quantum dots have proven challenging to couple to microwave photons. In this theoretical work we show that a sizable coupling for a single electron spin is possible via spin-charge hybridization using a magnetic field gradient in a silicon double quantum dot. Based on parameters already shown in recent experiments, we predict optimal working points to achieve a coherent spin-photon coupling, an essential ingredient for the generation of long-range entanglement. Furthermore, we employ input-output theory to identify observable signatures of spin-photon coupling in the cavity output field, which may provide guidance to the experimental search for strong coupling in such spin-photon systems and opens the way to cavity-based readout of the spin qubit.
VL - 96 U4 - 235434 UR - https://link.aps.org/doi/10.1103/PhysRevB.96.235434 CP - 23 U5 - 10.1103/PhysRevB.96.235434 ER -