Double-sided coaxial circuit QED with out-of-plane wiring

Journal article

Superconducting circuits are well established as a strong candidate platform for the development of quantum computing. In order to advance to a practically useful level, architectures are needed which combine arrays of many qubits with selective qubit control and readout, without compromising on coherence. Here, we present a coaxial circuit quantum electrodynamics architecture in which qubit and resonator are fabricated on opposing sides of a single chip, and control and readout wiring are provided by coaxial wiring running perpendicular to the chip plane. We present characterization measurements of a fabricated device in good agreement with simulated parameters and demonstrating energy relaxation and dephasing times of T1 = 4.1 μs and T2 = 5.7 μs, respectively. The architecture allows for scaling to large arrays of selectively controlled and measured qubits with the advantage of all wiring being out of the plane.

Authors: Rahamim, J; Behrle, T; Peterer, M; Patterson, A; Spring, P

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: AIP Publishing
• Journal: Applied Physics Letters
• Volume: 110
• Issue: 22
• Article number: 222602
• Publication date: 2017-05-29
• Acceptance date: 2017-05-16
• DOI: 10.1063/1.4984299
• EISSN: 1077-3118
• ISSN: 0003-6951
• Keywords: Journal Article