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 227701

Simulated 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

More information

Latest update

7/5/2024 1