Sebastian Paeckel | From wheels to qubits: Geometrically tuning the error rate

▶Title: From wheels to qubits: Geometrically tuning the error rate
▶Speaker: Sebastian Paeckel ( LMU )
▶Abstract: Breaking the error threshold would mark a milestone in establishing quantum advantage for a wide range of relevant problems. One possible route is to encode information redundantly in a logical qubit by combining several noisy qubits, providing an increased robustness against external perturbations. In this talk, I will present a setup for a logical qubit built from superconducting qubits coupled to a microwave cavity mode. The design is based on a recently discovered geometric stabilizing mechanism in the Bose-Hubbard wheel, which manifests as energetically well-separated clusters of many-body eigenstates. I will show how this geometric stabilization can be exploited to construct a highly redundant, energetically well-separated effective two-level system and to what extent the single-site gate fidelity of the resulting logical qubit can be increased, given typical experimental limitations.

▶ About the MCQST Conference 2024:
The Munich Conference on Quantum Science and Technology 2024 (MCQST 2024) brings together the Munich quantum community with international invited guests in academia and industry for three days of talks and poster sessions. Join hundreds of guests from around the world in the beautiful Bavarian Alps on 14-17 May 2024 to exchange ideas, learn about innovative research, and discuss the latest advancements in all fields of quantum science and technology.

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