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Problem Addressed

Quantum computers are an emergent technology, offering vast amounts of computational power. Superconducting quantum circuits—a leading candidate technology for large-scale quantum computing—require long signal coherence times to optimize fault tolerance. Currently, superconducting qubit coherence time improvements are being driven by design changes to superconducting materials, such as titanium nitride (TiN) superconducting coplanar waveguide resonators with high intrinsic quality factors. A major technical challenge is the wafer material. To be effective, qubit applications require materials with high intrinsic quality factors, near stoichiometric composition across wafers, wafer to wafer reproducibility, stability of milli-Kelvine temperature ranges and scalability.