Superconducting quantum circuits are leading candidates for quantum computing. Scaling up these systems for practical applications will require compact coherent qubits that store the quantum states, high fidelity quantum gates that process them, and a scalable architecture that can accommodate complex error correction circuits. Meeting such requirements is mainly impeded by the unavoidable presence of two-level systems (TLS), which act as a decoherence source that results in the loss of quantum information via phonon emission. In this project, we engineer superconducting circuits fabricated on acoustic bandgap devices to protect TLS’s from phonon emission, study engineered TLS properties, and use these results to design compact superconducting qubits protected from phonon and TLS dissipation.
Project currently funded by: Federal