Microwave Package Design for Superconducting Quantum Processors

Abstract

Solid-state qubits with transition frequencies in the microwave regime, such as superconducting qubits, are at the forefront of quantum information processing. However, high-fidelity, simultaneous control of superconducting qubits at even a moderate scale remains a challenge, partly due to the complexities of packaging these devices. Here, we present an approach to microwave package design focusing on material choices, signal line engineering, and spurious mode suppression. We describe design guidelines validated using simulations and measurements used to develop a 24-port microwave package. Analyzing the qubit environment reveals no spurious modes up to 11GHz. The material and geometric design choices enable the package to support qubits with lifetimes exceeding 350 μs. The microwave package design guidelines presented here address many issues relevant for near-term quantum processors.

15 pages, 9 figures

References in corpus (8)

• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• Charge insensitive qubit design derived from the Cooper pair box
• Microwave photonics with superconducting quantum circuits
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• AC-Stark Shift and Dephasing of a Superconducting Qubit Strongly Coupled to a Cavity Field
• Thermal and Residual Excited-State Population in a 3D Transmon Qubit
• Characterization and reduction of microfabrication-induced decoherence in superconducting quantum circuits
• Wirebond crosstalk and cavity modes in large chip mounts for superconducting qubits