Superconducting qubits are a leading system for realizing large-scale quantum processors,
but overall gate fidelities suffer from coherence times limited by microwave dielectric loss …

Superconducting circuits are among the most advanced quantum computing technologies;
however, their performance is limited by losses found in surface oxides and disordered …

Tantalum thin films sputtered on unheated silicon substrates are characterized with
microwaves at around 10 GHz in a 10 mK environment. We show that the phase of tantalum …

In recent years, the implementation of thin-film Ta has led to improved coherence times in
superconducting circuits. Efforts to further optimize this materials set have become a focus of …

We systematically investigate the influence of the fabrication process on dielectric loss in
aluminum-on-silicon superconducting coplanar waveguide resonators with internal quality …

The presence of amorphous oxide layers can significantly affect the coherent time of
superconducting qubits due to their high dielectric loss. Typically, the surface oxides of …

Silicon is a key semiconducting material for electrical devices and hybrid quantum systems
where low temperatures and zero-spin isotopic purity can enhance quantum coherence …

Motivated by recent advancements highlighting Ta as a promising material in low-loss
superconducting circuits and showing long coherence times in superconducting qubits, we …

Superconducting qubits are a promising platform for large-scale quantum computing.
Besides the Josephson junction, most parts of a superconducting qubit are made of planar …