Next generation superconducting qubits for quantum computing
The field of superconducting qubits is currently dominated by the transmon qubit. Over the course of more than a decade, much effort has been devoted to enhancing this circuit's coherence times. Despite the remarkable success, we should ask: is the transmon the best we can do, and will it ultimately suffice for implementing quantum error correction and leaving the NISQ era behind? As I will show, there are interesting circuit alternatives with enhanced intrinsic protection from noise that may well play a decisive role in the future. I will give a tour of some of our recent work on noise-protected qubits such as the zero-pi qubit, and illustrate how our open-source "scqubits" package has made it simpler than ever to explore the world of superconducting qubits.
Bio: Jens Koch is currently an Associate Professor in the Department of Physics & Astronomy at Northwestern University. His current research focuses on the theory, simulations, and advancement of hardware for quantum computing and quantum simulations using superconducting circuits and microwave photons. Koch’s expertise in superconducting qubits and circuit QED reaches back to important contributions to the original theory and development of the transmon and fluxonium qubits. The former currently represents the most widely employed superconducting qubit worldwide. Together with experimental collaborators, Koch’s group now works on the design of novel circuit elements, the development of next-generation quantum circuits with enhanced error protection, and on leveraging quantum optimal control theory for implementing high-fidelity gate operations and quantum-state readout.
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