Intrinsic Dissipation in Superconducting Junctions Probed by Qubit Spectroscopy

  title={Intrinsic Dissipation in Superconducting Junctions Probed by Qubit Spectroscopy},
  author={Dmitry S. Golubev and Artem V. Galaktionov and Andrei D. Zaikin},
  journal={physica status solidi (RRL) - Rapid Research Letters},
We propose to study frequency dependent intrinsic dissipation in a highly transparent Josephson junction by means of qubit spectroscopy. The spectral density of the effective dissipative bath may contain significant contributions from Andreev bound states coupled to fluctuations of the Josephson phase. Varying either the bias current applied to the junction or magnetic flux through a superconducting ring in the rf-SQUID setup, one can tune the level splitting value close to the bottom of the… 
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