On-chip superconducting microwave circulator from synthetic rotation

Understand

We analyze the design of a potential replacement technology for the commercial ferrite circulators that are ubiquitous in contemporary quantum superconducting microwave experiments.

• The lossless, lumped element design is capable of being integrated on chip with other superconducting microwave devices, thus circumventing the many performance-limiting aspects of ferrite circulators.
• The design is based on the dynamic modulation of DC superconducting microwave quantum interference devices (SQUIDs) that function as nearly linear, tunable inductors.
• The connection to familiar ferrite-based circulators is a simple frame boost in the internal dynamics' equation of motion.