The Quantum Socket: Three-Dimensional Wiring for Extensible Quantum Computing
J.H. B\'ejanin, T.G. McConkey, J.R. Rinehart, C.T. Earnest, C.R.H., McRae, D. Shiri, J.D. Bateman, Y. Rohanizadegan, B. Penava, P. Breul, S., Royak, M. Zapatka, A.G. Fowler, and M. Mariantoni

TL;DR
The paper introduces the quantum socket, a three-dimensional wiring technology that enhances connectivity and performance for solid-state qubits, facilitating scalable quantum computing architectures.
Contribution
It presents the design, fabrication, and testing of a novel 3D wiring solution for quantum hardware, improving scalability and performance over traditional 2D methods.
Findings
Operates from DC to 8 GHz with low contact resistance
Demonstrated successful measurement of superconducting resonators at 10 mK
Provides higher density and better performance wiring for quantum systems
Abstract
Quantum computing architectures are on the verge of scalability, a key requirement for the implementation of a universal quantum computer. The next stage in this quest is the realization of quantum error correction codes, which will mitigate the impact of faulty quantum information on a quantum computer. Architectures with ten or more quantum bits (qubits) have been realized using trapped ions and superconducting circuits. While these implementations are potentially scalable, true scalability will require systems engineering to combine quantum and classical hardware. One technology demanding imminent efforts is the realization of a suitable wiring method for the control and measurement of a large number of qubits. In this work, we introduce an interconnect solution for solid-state qubits: The quantum socket. The quantum socket fully exploits the third dimension to connect classical…
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