Microwave Circulation in an Extended Josephson Junction Ring

• URL: http://arxiv.org/abs/2512.02264v1
• Date: Mon, 01 Dec 2025 23:13:57 GMT
• Title: Microwave Circulation in an Extended Josephson Junction Ring
• Abstract summary: We propose a design for nonreciprocal microwave transmission based on an extended, annular Josephson junction.<n>We show how to harness this to build a high-quality resonant microwave circulator.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• 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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