Integration of Through-Sapphire Substrate Machining with Superconducting Quantum Processors.

ABSTRACT: A sapphire machining process integrated with intermediate-scale quantum processors is demonstrated. The process allows through-substrate electrical connections, necessary for low-frequency mode-mitigation, as well as signal-routing, which are vital as quantum computers scale in qubit number, and thus dimension. High-coherence qubits are required to build fault-tolerant quantum computers and so material choices are an important consideration when developing a qubit technology platform. Sapphire, as a low-loss dielectric substrate, has shown to support high-coherence qubits. In addition, recent advances in material choices such as tantalum and titanium-nitride, both deposited on a sapphire substrate, have demonstrated qubit lifetimes exceeding 0.3 ms. However, the lack of any process equival

SUBMITTER: Acharya N 

PROVIDER: S-EPMC11881675 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature