Qubits cannot exist without nonlinearity, but nonlinear elements in superconducting circuits lead to losses. A superconducting qubit has now been realized by nonlinearly coupling two microwave resonators, offering the promise of long coherence times.

中文翻译：

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设计非线性

没有非线性就不能存在量子位，但是超导电路中的非线性元件会导致损耗。现在已经通过非线性耦合两个微波谐振器实现了超导量子位，从而保证了长相干时间。