Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 50: German-French Focus Session: Superconducting Junctions and Quantum Circuits
TT 50.6: Vortrag
Mittwoch, 11. März 2026, 17:45–18:00, HSZ/0003
Spectroscopy of a nanowire fluxonium — •Hugues Pothier1, Joan Caceres1, Diego Sanz1, Jon Ortuzar1, Emmanuel Flurin1, Jesper Nygard2, Cristian Urbina1, and Marcelo Goffman1 — 1Quantronics group, SPEC (CNRS UMR 3680), CEA-Paris Saclay, University Paris-Saclay, 91191 Gif-sur-Yvette, France — 2Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
We fabricated a fluxonium qubit [1] in which the Josephson junction is replaced with a semiconducting nanowire weak link. The Josephson effect in the nanowire is associated with Andreev bound states, which themselves have been shown to behave as qubits [2-4]. Through precise analysis of the spectroscopy data, we searched for evidence of strongly transmitted channels [5] and for an hybridization of the two types of qubits.
[1] V.E.Manucharyan, J.Koch, M.H.Devoret,
Science 326, 113 (2009).
[2] C. Janvier et al., Science 349, 1199 (2015).
[3] M. Hays et al., Phys. Rev. Lett. 121, 047001 (2018).
[4] M. Hays et al., Science 373, 430 (2021).
[5] M. Pita-Vidal et al., Phys. Rev. Applied 14, 064038 (2020).
Keywords: Qubit; Fluxonium; Andreev; Hybrid