Design of an On-Chip Superconducting Microwave Circulator with Octave Bandwidth

Author
Abstract
We present a design for a superconducting, on-chip circulator composed of dynamically modulated transfer switches and delays. Design goals are set for the multiplexed readout of superconducting qubits. Simulations of the device show that it allows for low-loss circulation (insertion loss < 0.35 dB and isolation > 20 dB) over an instantaneous bandwidth of 2.3 GHz. This design improves on the bandwidth of previous superconducting circulators by more than an order of magnitude, making it ideal for integration with broadband quantum-limited amplifiers.
Year of Publication
2019
Journal Title
Physical Review Applied
Volume
11
Date Published
2019-04
URL
https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.11.044048
DOI
10.1103/PhysRevApplied.11.044048
JILA PI
Associated Institutes
Journal Article