Coherent longdistance spinqubittransmon coupling
Abstract
Spin qubits and superconducting qubits are among the promising candidates for a solid state quantum computer. For the implementation of a hybrid architecture which can profit from the advantages of either world, a coherent longdistance link is necessary that integrates and couples both qubit types on the same chip. We realize such a link with a frequencytunable high impedance SQUID array resonator. The spin qubit is a resonant exchange qubit hosted in a GaAs triple quantum dot. It can be operated at zero magnetic field, allowing it to coexist with superconducting qubits on the same chip. We find a working point for the spin qubit, where the ratio between its coupling strength and decoherence rate is optimized. We observe coherent interaction between the resonant exchange qubit and a transmon qubit in both resonant and dispersive regimes, where the interaction is mediated either by real or virtual resonator photons.
 Publication:

arXiv eprints
 Pub Date:
 March 2019
 arXiv:
 arXiv:1903.04022
 Bibcode:
 2019arXiv190304022L
 Keywords:

 Condensed Matter  Mesoscale and Nanoscale Physics
 EPrint:
 Nature Communications 10, 5037 (2019)