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Creators/Authors contains: "Seifert, Lennart Maximilian"

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  1. ; ; ; ; ; (, Physical Review A)
    Contemporary quantum computers encode and process quantum information in binary qubits (d = 2). How- ever, many architectures include higher energy levels that are left as unused computational resources. We demonstrate a superconducting ququart (d = 4) processor and combine quantum optimal control with efficient gate decompositions to implement high-fidelity ququart gates. We distinguish between viewing the ququart as a generalized four-level qubit and an encoded pair of qubits, and characterize the resulting gates in each case. In randomized benchmarking experiments we observe gate fidelities 95% and identify coherence as the primary limiting factor. Our results validate ququarts as a viable tool for quantum information processing. 
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  2. ; ; ; ; ; (, 2023 IEEE International Symposium on Hardware Oriented Security and Trust (HOST))
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  3. ; ; ; ; ; ; ; ; (, ISCA '23: Proceedings of the 50th Annual International Symposium on Computer Architecture)
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  4. ; ; ; ; ; (, Proceedings of the 28th ACM International Conference on Architectural Support for Programming Languages and Operating Systems)
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  5. ; ; ; ; (, 2022 IEEE International Conference on Quantum Computing and Engineering (QCE))
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