Events

   Superconducting qubits in high magnetic field

Ioan Pop (KIT)

Date/Time: Tuesday, 3rd December 2024 à 10:00 am

Place: Room Rémy Lemaire K223, Institut Néel

Abstract: Using a nano-Josephson junction, of only 20 nm cross-section, and superconducting granular Aluminum films with critical field above 5 Tesla, we operate a flux qubit in magnetic field of up-to 1.2 Tesla. Remarkably, the spectrum and coherence of the qubit remain stable in this entire range, and we observe the freezing of a paramagnetic spin ensemble coupled to the qubit.