Department of Physics, University of Wisconsin, 1150 University Avenue, Madison, Wisconsin 53706 USA.
Phys Rev Lett. 2010 Jan 8;104(1):010503. doi: 10.1103/PhysRevLett.104.010503.
We present the first demonstration of a CNOT gate between two individually addressed neutral atoms. Our implementation of the CNOT uses Rydberg blockade interactions between neutral atoms held in optical traps separated by >8 microm. Using two different gate protocols we measure CNOT fidelities of F=0.73 and 0.72 based on truth table probabilities. The gate was used to generate Bell states with fidelity F=0.48+/-0.06. After correcting for atom loss we obtain an a posteriori entanglement fidelity of F=0.58.
我们展示了首例两个独立寻址的中性原子之间的 CNOT 门实验。我们的 CNOT 门是通过处于光学陷阱中的中性原子之间的里德堡阻塞相互作用来实现的，这些原子之间的距离大于 8 微米。使用两种不同的门协议，我们根据真值表概率测量得到的 CNOT 保真度分别为 F=0.73 和 0.72。该门用于生成保真度为 F=0.48+/-0.06 的贝尔态。在纠正原子损耗后，我们得到了后验纠缠保真度 F=0.58。
