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 Centro Ricerche Frascati

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)

Vol. 49 6

Subject Categories

Condensed Matter Physics

DOI

10.1088/0022-3727/49/6/065303

More information

Latest update

4/9/2018 1