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Superconducting Qubits

Multiphonon transitions in a quantum electromechanical system

arXiv
Authors: Alpo Välimaa, Wayne Crump, Mikael Kervinen, Mika A. Sillanpää

Year

2021

Paper ID

62387

Status

Preprint

Abstract Read

~2 min

Abstract Words

69

Citations

N/A

Abstract

We investigate a superconducting qubit coupled to a quantum acoustic system in a near resonant configuration. In our system we measure multiphonon transitions, whose spectrum reveals distinctly nonclassical features and thus provides direct evidence of quantization of GHz sound, enabling phonon counting. Additionally, at a high driving amplitude comparable to the qubit-oscillator coupling, we observe a shift of the multiphonon spectral lines owing to dressing of many multiphonon transitions.

Why This Paper Matters

  • This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
  • It adds a 2021 reference point for readers tracking recent quantum research.
  • We investigate a superconducting qubit coupled to a quantum acoustic system in a near resonant configuration.

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