Microwave Circulation in an Extended Josephson Junction Ring

Dat Thanh Le; Arkady Fedorov; T. M. Stace

doi:10.1103/sbtv-plf7

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Microwave Circulation in an Extended Josephson Junction Ring

Dat Thanh Le, Arkady Fedorov, T. M. Stace

DOI 10.1103/sbtv-plf7 · Physical Review Letters

T1

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Abstract

Circulators are nonreciprocal devices that enable directional signal routing. Nonreciprocity, which requires time-reversal symmetry breaking, can be produced in waveguides in which the propagation medium moves relative to the waveguide at a moderate fraction of the wave speed. Motivated by this effect, here we propose a design for nonreciprocal microwave transmission based on an extended, annular Josephson junction, in which the propagation medium consists of a train of moving fluxons. We show how to harness this to build a high-quality resonant microwave circulator, and we theoretically evaluate the anticipated performance of such a device.

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Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb-AlOx-Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown