Microwave Package Design for Superconducting Quantum Processors

Solid-state qubits with transition frequencies in the microwave regime, such as superconducting qubits, are at forefront of quantum information processing. However, high-fidelity, simultaneous control even a moderate scale remains challenge, partly due to complexities packaging these devices. Here, we present an approach package design focusing on material choices, signal line engineering, and spurious mode suppression. We describe guidelines validated using simulations measurements used develop 24-port package. Analyzing qubit environment reveals no modes up 11 GHz. The geometric choices enable support lifetimes exceeding 350?s. presented here address many issues relevant for near-term processors.2 MoreReceived 13 December 2020Accepted 4 March 2021DOI:https://doi.org/10.1103/PRXQuantum.2.020306Published by American Physical Society under terms Creative Commons Attribution 4.0 International license. Further distribution this work must maintain attribution author(s) published article's title, journal citation, DOI.Published SocietyPhysics Subject Headings (PhySH)Research AreasQuantum computationQuantum solid state qubitsPhysical SystemsSuperconducting qubitsQuantum InformationCondensed Matter, Materials & Applied Physics