We present an entanglement scheme for Rydberg atoms using the van der Waals interaction phase induced by Ramsey-type pulsed interactions. This scheme realizes not only controlled phase operations between atoms at a distance larger than Rydberg blockade distance, but also various counterintuitive entanglement examples, including two-atom entanglement in the presence of a closer third atom and W-state generation for three partially blockaded atoms. Experimental realization is conducted with single rubidium atoms in optical tweezer dipole traps, to demonstrate the proposed entanglement generations with an entanglement fidelity of F=0.59±0.11.

中文翻译：

---

弱耦合体制中的Rydberg原子纠缠。

我们提出了一个拉德伯格原子的纠缠方案，使用了由拉姆齐型脉冲相互作用诱导的范德华相互作用相。该方案不仅实现了比Rydberg封锁距离大的原子之间的受控相操作，而且实现了各种违反直觉的纠缠实例，包括在更接近的第三原子存在下的两个原子纠缠和三个部分受阻原子的W态生成。在光学镊子偶极子陷阱中对单个rub原子进行实验实现，以证明拟议的纠缠世代的纠缠保真度为F = 0.59±0.11。