Acoustic spectral hole-burning in a two-level system ensemble
Artikel i vetenskaplig tidskrift, 2021

Microscopic two-level system (TLS) defects at dielectric surfaces and interfaces are among the dominant sources of loss in superconducting quantum circuits, and their properties have been extensively probed using superconducting resonators and qubits. We report on spectroscopy of TLSs coupling to the strain field in a surface acoustic wave (SAW) resonator. The narrow free spectral range of the resonator allows for two-tone spectroscopy where a strong pump is applied at one resonance, while a weak signal is used to probe a different mode. We map the spectral hole burnt by the pump tone as a function of frequency and extract parameters of the TLS ensemble. Our results suggest that detuned acoustic pumping can be used to enhance the coherence of superconducting devices by saturating TLSs.

Surface Acoustic wave

TLS

Författare

Gustav Andersson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

A. L. O. Bilobran

Universitat Politecnica de Valencia (UPV)

Marco Scigliuzzo

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

M. M. de Lima

Universitat Politecnica de Valencia (UPV)

J. H. Cole

RMIT University

Per Delsing

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantteknologi

npj Quantum Information

20566387 (eISSN)

Vol. 7 15

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Den kondenserade materiens fysik

DOI

10.1038/s41534-020-00348-0

Mer information

Skapat

2021-02-06