The realization of an efficient quantum optical interface for multi-qubit systems is an outstanding challenge in science and engineering. Using two atoms in individually-controlled optical tweezers coupled to a nanofabricated photonic crystal cavity, we demonstrate entanglement generation, fast non-destructive readout, and full quantum control of atomic qubits. The entangled state is verified in free space after being transported away from the cavity by encoding the qubits into long-lived states and using dynamical decoupling. Our approach bridges quantum operations at an optical link and in free space by a coherent one-way transport, potentially enabling an integrated optical interface for atomic quantum processors.

中文翻译：

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光镊中原子的纠缠传输和纳米光子界面

为多量子比特系统实现高效的量子光学接口是科学和工程领域的一项突出挑战。在与纳米制造的光子晶体腔耦合的单独控制的光镊中使用两个原子，我们展示了纠缠产生、快速无损读出和原子量子比特的完全量子控制。通过将量子比特编码为长寿命状态并使用动态解耦，纠缠态在从空腔中运出后在自由空间中得到验证。我们的方法通过相干单向传输在光学链路和自由空间中架起量子操作的桥梁，从而可能为原子量子处理器提供集成光学接口。