1D Josephson quantum interference grids: diffraction patterns and dynamics
Journal article, 2016
We investigate the magnetic response of transmission lines with embedded Josephson junctions and thus generating a 1D underdamped array. The measured multi-junction interference patterns are compared with the theoretical predictions for Josephson supercurrent modulations when an external magnetic field couples both to the inter-junction loops and to the junctions themselves. The results provide a striking example of the analogy between Josephson phase modulation and 1D optical diffraction grid. The Fiske resonances in the current-voltage characteristics with voltage spacing Phi(0)((c) over bar /2L) , where L is the total physical length of the array, Phi(0) the magnetic flux quantum and (c) over bar the speed of light in the transmission line, demonstrate that the discrete line supports stable dynamic patterns generated by the ac Josephson effect interacting with the cavity modes of the line.
superconductivity
arrays of Josephson junctions
Josephson effect
Author
M. Lucci
University of Rome Tor Vergata
D. Badoni
University of Rome Tor Vergata
V. Corato
ENEA
University of Rome Tor Vergata
V. Merlo
University of Rome Tor Vergata
I. Ottaviani
University of Rome Tor Vergata
G. Salina
University of Rome Tor Vergata
M. Cirillo
Superconductors, oxides and other innovative materials and devices
University of Rome Tor Vergata
A. V. Ustinov
Karlsruhe Institute of Technology (KIT)
National University of Science & Technology (MISIS)
Dag Winkler
Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics
Journal of Physics D: Applied Physics
0022-3727 (ISSN) 13616463 (eISSN)
Vol. 49 6 065303Subject Categories
Condensed Matter Physics
DOI
10.1088/0022-3727/49/6/065303