Robust tunable coupling between superconductive circuits

A method for providing a tunable coupling between two components in a superconducting circuit, comprising:

• fabricating a first circuit path between the two components, the first circuit path comprising a plurality of circuit elements, each of the plurality of circuit elements comprising one of an inductor, a capacitor, and a Josephson junction;
• and
• fabricating a plurality of tunable oscillators, each responsive to a control signal to tune an associated frequency of the oscillator and connected from a point along the first circuit path.

A tunable coupler assembly for linking two components in a superconducting circuit, comprising:

• a plurality of circuit elements, connected in series on a path connecting the two components each of the plurality of circuit elements comprising one of an inductor, a capacitor, and a Josephson junction;
• and
• a plurality of compound Josephson junctions, connected from the path connecting the two components to ground, each tunable oscillator being responsive to a control flux provided by a common bias line to tune an associated resonant frequency of the tunable oscillator within a first frequency range, within which the two components are coupled, and within a second frequency range, within which the two components are isolated.