Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session L39: Characterizing and Controlling Superconducting Circuits II
11:15 AM–2:15 PM,
Wednesday, March 7, 2018
LACC
Room: 501B
Sponsoring
Unit:
DQI
Chair: Irfan Siddiqi, University of California Berkeley
Abstract ID: BAPS.2018.MAR.L39.12
Abstract: L39.00012 : Coherent control of two qubits in coaxial circuit QED*
1:51 PM–2:03 PM
Presenter:
Andrew Patterson
(Condensed Matter Physics, University of Oxford)
Authors:
Andrew Patterson
(Condensed Matter Physics, University of Oxford)
Joseph Rahamim
(Condensed Matter Physics, University of Oxford)
Takahiro Tsunoda
(Condensed Matter Physics, University of Oxford)
Peter Spring
(Condensed Matter Physics, University of Oxford)
Tanja Behrle
(Condensed Matter Physics, University of Oxford)
Martina Esposito
(Condensed Matter Physics, University of Oxford)
Giovanna Tancredi
(Condensed Matter Physics, University of Oxford)
Peter Leek
(Condensed Matter Physics, University of Oxford)
A major obstacle in scaling up monolithic superconducting-circuit quantum computing architectures is the circuit complexity that results from integration of the required control and measurement lines with the qubits. We address this obstacle by adopting a circuit architecture with entirely off-chip out-of-plane wiring; coaxial qubits ("coaxmons") and lumped element LC resonators are fabricated on opposing sides of a single chip, and control and readout are provided by coaxial cables running perpendicular to the chip plane.
We present the first measurements of pairs of detuned, weakly capacitively coupled, static frequency coaxmon qubits. The cross-resonance interaction between the qubits is characterised using process tomography, and the results are used to tune the microwave drives applied to the two qubits to optimise gate fidelities.
*We acknowledge financial support from the EPSRC under grant EP/M013243/1, and Oxford Instruments Nanoscience.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.L39.12
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