Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session B48: Proximity Effect and Andreev Reflection
11:30 AM–2:06 PM,
Monday, March 15, 2021
Sponsoring
Unit:
DCMP
Chair: Marcio de Andrade, Naval Information Warfare Center Pacific
Abstract: B48.00012 : Electrodynamic Response of a Solitary Andreev Level – Experimental Measurements*
1:42 PM–1:54 PM
Live
Presenter:
Valla Fatemi
(Departments of Applied Physics and Physics, Yale University)
Authors:
Valla Fatemi
(Departments of Applied Physics and Physics, Yale University)
Pavel Kurilovich
(Departments of Applied Physics and Physics, Yale University)
Max Hays
(Departments of Applied Physics and Physics, Yale University)
Nicholas Frattini
(Departments of Applied Physics and Physics, Yale University)
Daniel Bouman
(Department of Microtechnology and Nanoscience, Chalmers University)
Vladislav Kurilovich
(Departments of Applied Physics and Physics, Yale University)
Thomas Connolly
(Departments of Applied Physics and Physics, Yale University)
Spencer Diamond
(Departments of Applied Physics and Physics, Yale University)
Peter Krogstrup
(Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen)
Jesper Nygard
(Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen)
Attila Geresdi
(Department of Microtechnology and Nanoscience, Chalmers University)
Leonid Glazman
(Departments of Applied Physics and Physics, Yale University)
Michel Devoret
(Departments of Applied Physics and Physics, Yale University)
In this experimental talk, we describe how the state-dependent inductive response of a Josephson semiconductor nanowire hosting a solitary Andreev level was measured with a superconducting microwave resonator. We observed electrodynamic signatures of two key features of the Josephson resonant level. First, the inductance-phase relation of the continuum part of the superconducting density-of-states is revealed when the level is occupied by a single quasiparticle. Second, Coulomb interactions result in deviations from the occupation rules associated with non-interacting fermionic levels. These results lay foundations for investigating Andreev and Majorana bound states via sensitive circuit quantum electrodynamics tools.
*Work supported by ARO
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