Microwave Circulation in an Extended Josephson Junction Ring

Author(s): Dat Thanh Le, Arkady Fedorov, and T. M. Stace 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 effe… [Phys. Rev. Lett. 135, 230801] Published Mon Dec 01, 2025