Circuit-QED-based measurement of vortex lattice order in a Josephson junction array

  title={Circuit-QED-based measurement of vortex lattice order in a Josephson junction array},
  author={R. Cosmic and H. Ikegami and Zhirong Lin and K. Inomata and Jacob M. Taylor and Yasunobu Nakamura},
  journal={Physical Review B},
Superconductivity provides a canonical example of a quantum phase of matter. When superconducting islands are connected by Josephson junctions in a lattice, the low-temperature state of the system can map to the celebrated XY model and its associated universality classes. This has been used to experimentally implement realizations of Mott insulator and Berezinskii-Kosterlitz-Thouless transitions to vortex dynamics analogous to those in type-II superconductors. When an external magnetic field is… Expand
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