Speaker
Description
The CLIQUE (Controlled Linac Irradiation of Quantum Experiments) Facility at Johns Hopkins Applied Physics Laboratory is an experimental user facility that contains an electron linear accelerator (linac) used as an on-demand high-energy particle source to study deleterious effects on quantum systems. The linac provides a pulsed, microsecond burst of ~20 MeV electrons that are redirected at a modified dilution refrigerator where they deposit energy in the system of interest (e.g. superconducting qubits, quantum dot spin qubits, or detectors). The error dynamics of individual qubits and the system as a whole can be easily and quickly extracted due to the on-demand nature of our radiation source. We present extensive results on radiation-induced qubit errors in both fixed-frequency and flux-tunable transmons. We additionally highlight joint efforts with external researchers, including a gap-engineering study with MIT and quantum dot measurements with UW-Madison. The CLIQUE facility, open to future collaborations, provides a testbed for novel quantum device design and packaging techniques for radiation-induced error mitigation.
