A Josephson crystal can be realized by a Josephson junction
chain, formed by repeating a single junction or SQUID in space to form a one-dimensional ladder structure.
When multiple domains exist, gradients between domains of differing phase [phi] are accompanied by currents that tunnel between the domains as the spaces between the domains form Josephson junctions
Benz and his coworkers, for example, take advantage of phase locking to ensure that large arrays of superconducting Josephson junctions
display voltage oscillations of a well-defined frequency, despite small differences among the individual components.
In order to synchronize the signal, Argonne physicist Alexei Koshelev suggested that the stacks of Josephson junctions
should be shaped into resonant cavities, which visiting scientist Lufti Ozyuzer of the Izmir Institute of Technology, Turkey, and graduate student Cihan Kurter then fashioned.
Earlier efforts to develop a computer using superconducting Josephson junctions
failed, partly because the researchers--following standard practice in semiconductors--chose to encode binary data as high and low voltages,.
These chips utilize Josephson junctions
In these seven papers contributors describe their research in facets of Josephson junctions
, including progress in fabrication techniques for circuits of small capacitance, the order parameter symmetry of unconventional superconductors by Josephson effects, annular Josephson tunnel junctions that monitor causal horizons, non-equilibrium phase diagrams of current-driven arrays, Josephson vortex behavior in certain superconducting ceramics under a low frequency magnetic field, thermomagnetic shock waves in the vortex stage of Type-II superconductors and finite temperature effects on the quantum phase transition in disordered d-wave superconductors.
In the late 1960s, the relationship between voltage and frequency was measured precisely with newly discovered superconductor devices called Josephson junctions
8-picosecond, single-flux-quantum (SFQ) voltage pulses in YBCO Josephson junctions
Now researchers have found that a single crystal of a copperoxide superconductor can by itself act as a set of Josephson junctions
Through Hamilton's work, the Josephson junction
array voltage standard became a robust superconductor integrated circuit containing about 20,000 Josephson junctions
and remains the most complex superconducting circuit in practical use today.
This is a significant milestone toward creating lumped arrays of Josephson junctions
for ac voltage standards.