Cross-Kerr nonlinearity has many important applications in quantum computation and quantum information processing. Here, we propose a one-step method to realize a cross-Kerr nonlinearity between two nitrogen-vacancy center ensembles (NV ensembles). The realization of cross-Kerr nonlinearity is based on a superconducting flux qubit dispersively coupled to two NV ensembles. Numerical simulations show that this cross-Kerr nonlinearity can be high-fidelity constructed a two-qubit controlled phase gate of NV ensembles.

中文翻译：

---

通过超导通量量子位单步实现NV中心的两个集合之间的Cross-Kerr非线性

Cross-Kerr非线性在量子计算和量子信息处理中具有许多重要的应用。在这里，我们提出了一种一步方法来实现两个氮空位中心团（NV团）之间的跨克尔非线性。跨Keer非线性的实现基于分散耦合到两个NV集成的超导通量量子位。数值仿真表明，这种跨Keer非线性可以高保真地构建一个由NV集成的两比特控制的相位门。