Events at Physics |
Events During the Week of May 10th through May 17th, 2026
Monday, May 11th, 2026
- No events scheduled
Tuesday, May 12th, 2026
- Graduate Program Event
- Single-spin readout in Si/SiGe quantum dots via proton-assisted tunneling
- Time: 2:00 pm - 4:00 pm
- Place: Chamberlin 5310
- Speaker: Owen Eskandari
- Abstract: In Si/SiGe spin qubits, much attention has focused on high-fidelity and tunable gate operations, yet achieving the same goals for readout, which is a core requirement for quantum error correction, has received less attention. Traditionally, single-electron spin qubits are read out using either of two methods. Elzerman readout relies on proximity to a reservoir. Parity readout requires an additional electron in the double dot system used for readout and a large valley splitting to achieve a large singlet-triplet splitting. Here, we present a reservoir-free readout scheme for single-electron qubits in a double dot that does not rely on additional electrons or the need for a large valley splitting. This readout scheme uses photon-assisted tunneling (PAT), enabling spin-to-charge conversion and readout via a nearby charge sensor. We show that features in the energy dispersion arising from random alloy disorder may be used to optimize the PAT drive parameters and achieve high-fidelity and tunable readout. To provide physically realistic and accurate estimates, we develop a new scheme for computing localized electron states in a double dot, which allows us to make use of the MaSQE simulation tool. These results pave the way for implementing a new high-fidelity readout scheme in single-electron qubits.
- Host: Mark Friesen
- Council Meeting
- Time: 3:00 pm - 4:00 pm
- Place: 2314 Chamberlin
- Speaker: Kevin Black
- Host: Kevin Black
Wednesday, May 13th, 2026
- Department Meeting
- Time: 12:15 pm - 1:15 pm
- Place: B343 Sterling
- Speaker: Kevin Black, UW - Madison, Department of Physics
- Department Meeting
- Host: Kevin Black
Thursday, May 14th, 2026
- R. G. Herb Condensed Matter Seminar
- Title to be announced
- Time: 10:00 am - 6:00 pm
- Place: 5310 Chamberlin Hall
- Speaker: Roman Kuzmin , UW-Madisoon
- Host: Victor Brar
Friday, May 15th, 2026
- No events scheduled
Saturday, May 16th, 2026
- No events scheduled
Sunday, May 17th, 2026
- Academic Calendar
- Faculty Contract Year Ends
- Abstract: *Note: actual end time may vary.* CONTACT: admin@secfac.wisc.edu