TY - JOUR
T1 - Determination of the current density distribution in Josephson junctions
AU - Carmody, M.
AU - Landree, E.
AU - Marks, L. D.
AU - Merkle, K. L.
N1 - Funding Information:
This work was supported by the National Science Foundation Office of Science and Technology Centers, under contract No. DMR 91-20000 (MC and LDM) and the United States Department of Energy, Basic Energy Sciences-Materials Science, under contract No. W-31-109-ENG-38 (KLM) and National Science Foundation grant No. DMR-9214505 (EL).
PY - 1999/4/20
Y1 - 1999/4/20
N2 - By using a phase retrieval algorithm similar to the Gerchberg-Saxton error-reduction algorithm with a generalized projection onto sets form, it is possible to restore the phase information that is not measured when experimentally recording Ic(B) data for Josephson junctions without making any assumptions about the current density distribution j(x). In general, it is not possible to find a unique solution for the 1-D phase problem; however, it is possible with the assistance of the genetic algorithm to efficiently find all possible solutions. If multiple solutions exist for a junction, the set of all possible solutions can be compared against the boundary microstructure and the correct solution can be determined.
AB - By using a phase retrieval algorithm similar to the Gerchberg-Saxton error-reduction algorithm with a generalized projection onto sets form, it is possible to restore the phase information that is not measured when experimentally recording Ic(B) data for Josephson junctions without making any assumptions about the current density distribution j(x). In general, it is not possible to find a unique solution for the 1-D phase problem; however, it is possible with the assistance of the genetic algorithm to efficiently find all possible solutions. If multiple solutions exist for a junction, the set of all possible solutions can be compared against the boundary microstructure and the correct solution can be determined.
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U2 - 10.1016/S0921-4534(99)00189-6
DO - 10.1016/S0921-4534(99)00189-6
M3 - Article
AN - SCOPUS:0032649147
VL - 315
SP - 145
EP - 153
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 3
ER -