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RESEARCH PRODUCT

Acoustic spectral hole-burning in a two-level system ensemble

Jared H. ColeGustav AnderssonPer DelsingMarco ScigliuzzoM. M. De LimaAndre Luiz Oliveira Bilobran

subject

Computer Networks and CommunicationsQC1-999FOS: Physical sciences02 engineering and technologyDielectric01 natural sciencesMolecular physicsResonator0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)Computer Science (miscellaneous)Coherence (signal processing)010306 general physicsSpectroscopyPhysicsQuantum PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsPhysicsSurface acoustic waveResonanceStatistical and Nonlinear PhysicsQA75.5-76.95021001 nanoscience & nanotechnologyComputational Theory and MathematicsElectronic computers. Computer scienceSpectral hole burning0210 nano-technologyQuantum Physics (quant-ph)Free spectral range

description

AbstractMicroscopic 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.

yearjournalcountryeditionlanguage
2020-02-21
10.1038/s41534-020-00348-0http://arxiv.org/abs/2002.09389