Selective switching of frequency multiplexed microwave signals using cascading multi-path interferometric josephson switches with nonoverlapping bandwidths

A method to form a cascading selective microwave switch (cascade), the method comprising:

• fabricating a set of Josephson devices, each Josephson device in the set having a corresponding operating bandwidth of microwave frequencies;
• and
• forming a series coupling between the Josephson devices from the set, wherein the series coupling reflects from a frequency multiplexed microwave signal (multiplexed signal) frequencies in those operating bandwidths which correspond to open Josephson devices in the series coupling.

A superconductor fabrication system which when operated to fabricate a cascading selective microwave switch (cascade) performing operations comprising:

• fabricating a set of Josephson devices, each Josephson device in the set having a corresponding operating bandwidth of microwave frequencies;
• and
• forming a series coupling between the Josephson devices from the set, wherein the series coupling reflects from a frequency multiplexed microwave signal (multiplexed signal) frequencies in those operating bandwidths which correspond to open Josephson devices in the series coupling.