Superconducting to Insulating Phase Transition in Current-Biased Josephson Junction Arrays

POSTER

Abstract

We present a variational approach to treat the metastable superconducting state in an array of small Josephson junctions driven by an applied current. The approach is a generalization of one previously used to treat such an array at zero applied current. We find that, for a given array, a superconducting to non-superconducting transition can be achieved as a function of applied current, or by varying the direction of the applied current at fixed magnitude. This transition can be observed for a wide range of junction parameters including the range in which single junctions are tuned to be two-level systems.

Authors

  • C.D. Porter

    Department of Physics, The Ohio State University

  • Kyung Yu

    University of Akron, Youngstown State University, Shady Side Academy, Westminster College, Nitronex Corporation, Durham, NC, AFRL,Wright-Patterson AFB, Ohio, University of Michigan, Ann Arbor, Department of Physics, The Ohio State University, Lunghwa University of Science and Technology, Eastern Michigan University, Wright State University, Michigan State University, Texas A\&M University and Princeton University, Joint Institute for Nuclear Research (Dubna), Naval Research Laboratory, ManTech SRS Technologies, Inc., Ecopulse, Inc., Army Research Laboratory, University of Surrey, Kettering University, Flint, MI, Pennsylvania State University, University of TN