High-Density Cryogenic Wiring for Superconducting Qubit Control

Quantum computing and cryogenic systems require high-density wiring capable of transmitting RF signals to superconducting qubits effectively and efficiently. Traditionally, these systems have been constrained by the limited ability of existing wiring solutions to function effectively in the low-temperature environment of a dilution refrigerator, thus hampering performance. Existing wiring systems often suffer from inflexibility and inability to maintain signal integrity at lower temperatures. The inflexibility can lead to problems in the efficient organization of the wiring, while loss of signal integrity at lower temperatures inhibits the reliable transmission of signals to superconducting qubits. These challenges highlighted the need for a wiring system designed specifically for the unique needs of such platforms.

Technology Description

This technology is a high-density wiring system created to transmit radio-frequency (RF) signals to superconducting qubits situated within a dilution refrigerator. Composing of multiple flexible layers, the system integrates conductive layers between adjacent pairs of such flexible layers. These conductive layers are primarily constructed using phosphor bronze. The wiring system found at the lower-temperature stages of the dilution refrigerator is often coated with superconducting material for optimal performance. This invention provides a unique advantage in its density, the flexibility of its layers, and its suitability for low-temperature environments. The use of a unique material such as phosphor bronze for the conductive layers and the addition of superconducting material coating at the lower-temperature stages differentiates this invention from traditional wiring systems. Such features make it highly relevant for applications such as superconducting quantum computers, cryogenic sensors, and other forms of cryogenic infrastructure.