Tunneling spectroscopy using a probe qubit

A. J. Berkley, A. J. Przybysz, T. Lanting, R. Harris, N. Dickson, F. Altomare, M. H. Amin, P. Bunyk, C. Enderud, E. Hoskinson, M. W. Johnson, E. Ladizinsky, R. Neufeld, C. Rich, A. Yu Smirnov, E. Tolkacheva, S. Uchaikin, A. B. Wilson

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Abstract

We describe a quantum tunneling spectroscopy technique that requires only low-bandwidth control. The method involves coupling a probe qubit to the system under study to create a localized probe state. The energy of the probe state is then scanned with respect to the unperturbed energy levels of the probed system. Incoherent tunneling transitions that flip the state of the probe qubit occur when the energy bias of the probe is close to an eigenenergy of the probed system. Monitoring these transitions allows the reconstruction of the probed system eigenspectrum. We demonstrate this method on an rf SQUID flux qubit.

Original languageEnglish
Article number020502
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume87
Issue number2
DOIs
Publication statusPublished - 3 Jan 2013

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Berkley, A. J., Przybysz, A. J., Lanting, T., Harris, R., Dickson, N., Altomare, F., Amin, M. H., Bunyk, P., Enderud, C., Hoskinson, E., Johnson, M. W., Ladizinsky, E., Neufeld, R., Rich, C., Smirnov, A. Y., Tolkacheva, E., Uchaikin, S., & Wilson, A. B. (2013). Tunneling spectroscopy using a probe qubit. Physical Review B - Condensed Matter and Materials Physics, 87(2), [020502]. https://doi.org/10.1103/PhysRevB.87.020502