Probing strongly driven and strongly coupled superconducting qubit-resonator system

  1. Oleh V. Ivakhnenko,
  2. Christoforus Dimas Satrya,
  3. Yu-Cheng Chang,
  4. Rishabh Upadhyay,
  5. Joonas T. Peltonen,
  6. Sergey N. Shevchenko,
  7. Franco Nori,
  8. and Jukka P. Pekola
We investigated a strongly driven qubit strongly connected to a quantum resonator. The measured system was a superconducting flux qubit coupled to a coplanar-waveguide resonator which is weakly coupled to a probing feedline. This hybrid qubit-resonator system was driven by a magnetic flux and probed with a weak probe signal through the feedline. We observed and theoretically described the quantum interference effects, deviating from the usual single-qubit Landau-Zener-Stückelberg-Majorana interferometry, because the strong coupling distorts the qubit energy levels.

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