Colloquium- “Using a superconducting transmon to probe mesoscopic phenomena” with Prof. Angela Kou
Physics Colloquium
November 15, 2023
3:00 PM - 4:45 PM
Location
2SES 238
Calendar
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Speaker: Prof. Angela Kou, University of Illinois Urbana-Champaign
Abstract: Superconducting circuits have extremely long coherence times and have been used widely as qubits, quantum-limited amplifiers, and mixers. In this talk, I will discuss using superconducting circuits as sensors for different types of condensed matter. I will introduce the transmon qubit and discuss how the transmon can be used to probe mesoscopic superconductors. As an example, I will discuss our work probing the phase diagram of a superconductor-quantum dot-superconductor (S-QD-S) system, which has been suggested as a building block for making topological superconductors. We measure the full phase diagram of the S-QD-S system as a function of gate voltages and magnetic field. Finally, I will conclude with our observations of the anomalous Josephson effect, which results from the interplay between spin-orbit coupling, magnetic fields, and superconductivity.
Date posted
Sep 21, 2023
Date updated
Nov 9, 2023