Microwave Susceptibility Observation of Interacting Many-Body Andreev States
Journal article, 2022
Electrostatic charging affects the many-body spectrum of Andreev states, yet its influence on their microwave properties has not been elucidated. We developed a circuit quantum electrodynamics probe that, in addition to transition spectroscopy, measures the microwave susceptibility of different states of a semiconductor nanowire weak link with a single dominant (spin-degenerate) Andreev level. We found that the microwave susceptibility does not exhibit a particle-hole symmetry, which we qualitatively explain as an influence of Coulomb interaction. Moreover, our state-selective measurement reveals a large, ?-phase shifted contribution to the response common to all many-body states which can be interpreted as arising from a phase-dependent continuum in the superconducting density of states.
Author
V. Fatemi
Yale University
P. D. Kurilovich
Yale University
M. Hays
Yale University
Daniël Bouman
Delft University of Technology
Kavli Institute of Nanoscience Delft
T. Connolly
Yale University
S. Diamond
Yale University
N. E. Frattini
Yale University
V. D. Kurilovich
Yale University
P. Krogstrup
Niels Bohr Institute
J. Nygard
Niels Bohr Institute
Attila Geresdi
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Kavli Institute of Nanoscience Delft
Delft University of Technology
L. I. Glazman
Yale University
M. H. Devoret
Yale University
Physical Review Letters
0031-9007 (ISSN) 1079-7114 (eISSN)
Vol. 129 22 227701Simulated Majorana states (SiMS)
European Commission (EC) (EC/H2020/804988), 2019-06-01 -- 2024-01-31.
Subject Categories
Atom and Molecular Physics and Optics
Theoretical Chemistry
Condensed Matter Physics
DOI
10.1103/PhysRevLett.129.227701
PubMed
36493424