Plug & Play quantum circuits

  • date:

    Dienstag, 09.05.2023, 16.00 Uhr

  • speaker:

    Prof. Wolfgang Pfaff
    University of Illinois at Urbana-Champaign, USA

  • Abstract: Superconducting quantum circuits are a leading platform for building large-scale quantum systems, such as quantum processors or simulators, from the bottom up. Circuit quantum electrodynamics provides us with excellent control over single artificial atoms, microwave photons, and their interactions. Scaling circuits to larger and larger numbers of qubits, however, is an ongoing challenge: Owing to inevitable imperfections in designing and fabricating devices, building large systems with precisely defined interactions is very difficult.
    In this talk, I will present our efforts to build circuits in a 'plug-and-play' fashion from isolated and separated components. By utilizing drive-controlled qubit-photon interactions we aim to realize modular and reconfigurable quantum networks in which qubits exchange quantum information through microwave photons. We are exploring how fast and high-fidelity two-qubit gates can be performed, quantum information may be distributed, and how remote entanglement may be stabilized through a common bath, for instance through engineered nonreciprocal qubit-photon interactions.
    Our work may provide insight on how quantum devices can be scaled more robustly, and how distributed quantum states can be stabilized in open systems.