In article number 2001443, Stephan W. Anderson, Xin Zhang, and co‐workers demonstrate a nonreciprocal system based on the linear and nonlinear meta‐atoms. Theoretical studies and experiments reveal the bounds of the nonreciprocity based on the passive and nonlinear resonators. The paradigm may be employed to construct magnetless radiofrequency isolators and other nonreciprocal devices.

中文翻译：

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不可逆性：使用非线性元原子的不可逆磁耦合（Adv。Sci。19/2020）

Stephan W. Anderson，Xin Zhang和同事在文章编号2001443中展示了一个基于线性和非线性元原子的不可逆系统。理论研究和实验揭示了基于无源和非线性谐振器的不可逆边界。该范例可用于构造无磁射频隔离器和其他不可逆设备。