The Role of LC Resonators in Superconducting Quantum Computing-Dr. Saleem Rao

Over the past two decades, quantum hardware aimed at surpassing classical computers has advanced across multiple platforms—optical systems, trapped ions, superconducting circuits, and material defects—by exploiting superposition and entanglement. Yet no platform has achieved fault tolerance, largely due to scalability and coherence limits. Planar superconducting circuits in the cQED architecture remain especially promising, but decoherence—driven by two-level system (TLS) defects at interfaces—remains a key bottleneck. This talk highlights the critical role of LC circuits in these devices and examines why, despite their simplicity, a scalable, commercial-grade quantum computer is still out of reach.