NCSA Calendar
NCSA staff who would like to submit an item for the calendar can email newsdesk@ncsa.illinois.edu.
IQUIST Young Researchers Seminar: "Fluxonium as a control qubit for cat state encoding," Jasper Bradford, Pfaff Group
- Event Type
- Seminar/Symposium
- Sponsor
- IQUIST
- Location
- 190 Engineering Sciences Building, 1101 W Springfield Ave, Urbana, IL 61801
- Date
- Nov 19, 2025 11:00 - 11:50 am
- Speaker
- Jasper Bradford, Pfaff Group
- Contact
- Wolfgang Pfaff
- wpfaff@illinois.edu
- Phone
- 217-300-8256
- Views
- 32
- Originating Calendar
- IQUIST Young Researchers Seminar
Abstract: Bosonic codes in superconducting resonators are a hardware-efficient avenue for quantum error correction and benefit from favorable error hierarchies provided by long-lived cavities compared to typical superconducting qubits. The required coupling to an ancillary control qubit, however, can negate these benefits by inducing highly detrimental effects such as excess decoherence and undesired nonlinearities. An important question is thus whether a cavity-qubit coupling can be realized that offers readout and control capabilities without spoiling the cavity. Here, we show numerically that the fluxonium can reach cavity-coupling regimes that eliminate undesirable cavity nonlinearities. We plan to incorporate this almost-purely dispersive interaction in a system with long coherence to achieve a bosonic memory with a low error rate.
Bio: Jasper Bradford is a 3rd year physics student working for Wolfgang Pfaff on experimental superconducting qubits