Readout of a qubit array via a single transmission line
Physikalisches Institut, Karlsruhe Institute of Technology and DFG-Center for Functional Nanostructures (CFN) D-76128 Karlsruhe, Germany, EU
2 Institute of Photonic Technology - PO Box 100239, D-07702 Jena, Germany, EU
Accepted: 30 September 2011
Frequency-selective readout for superconducting qubits opens up the way towards scaling qubit circuits without increasing the number of measurement lines. Here we demonstrate the readout of an array of 7 flux qubits located on the same chip using a single measurement line. Each qubit is placed near an individual λ/4 resonator which, in turn, is coupled to a common microwave transmission line. We performed spectroscopy and coherent manipulation of all qubits and determined their parameters in a single measurement run.
PACS: 03.67.Lx – Quantum computation architectures and implementations / 85.25.Am – Superconducting device characterization, design, and modeling
© EPLA, 2011