Acoustic spectral hole-burning in a two-level system ensemble
- URL: http://arxiv.org/abs/2002.09389v2
- Date: Tue, 7 Dec 2021 01:07:42 GMT
- Title: Acoustic spectral hole-burning in a two-level system ensemble
- Authors: Gustav Andersson, Andr\'e Luiz Oliveira Bilobran, Marco Scigliuzzo,
Mauricio M. de Lima, Jared H. Cole and Per Delsing
- Abstract summary: Microscopic two-level system (TLS) defects are among the dominant sources of loss in superconducting quantum circuits.
We report on spectroscopy of TLSs coupling to the strain field in a surface acoustic wave (SAW) resonator.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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.
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