1D Josephson quantum interference grids: diffraction patterns and dynamics
Artikel i vetenskaplig tidskrift, 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

Författare

M. Lucci

Universita degli Studi di Roma Tor Vergata

D. Badoni

Universita degli Studi di Roma Tor Vergata

V. Corato

ENEA Centro Ricerche Frascati

Universita degli Studi di Roma Tor Vergata

V. Merlo

Universita degli Studi di Roma Tor Vergata

I. Ottaviani

Universita degli Studi di Roma Tor Vergata

G. Salina

Universita degli Studi di Roma Tor Vergata

M. Cirillo

Superconductors, oxides and other innovative materials and devices

Universita degli Studi di Roma Tor Vergata

A. V. Ustinov

Karlsruher Institut für Technologie (KIT)

National University of Science & Technology (MISIS)

Dag Winkler

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Journal of Physics D: Applied Physics

0022-3727 (ISSN)

Vol. 49

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1088/0022-3727/49/6/065303