Quantum teleportation, the faithful transfer of an unknown input state onto a remote quantum system¹, is a key component in long-distance quantum communication protocols² and distributed quantum computing^3,4. At the same time, high-frequency nano-optomechanical systems⁵ hold great promise as nodes in a future quantum network⁶, operating on-chip at low-loss optical telecom wavelengths with long mechanical lifetimes. Recent demonstrations include entanglement between two resonators⁷, a quantum memory⁸ and microwave-to-optics transduction^9,10,11. Despite these successes, quantum teleportation of an optical input state onto a long-lived optomechanical memory is an outstanding challenge. Here we demonstrate quantum teleportation of a polarization-encoded optical input state onto the joint state of a pair of nanomechanical resonators. Our protocol also allows to store and retrieve an arbitrary qubit state onto a dual-rail encoded optomechanical quantum memory. This work demonstrates the full functionality of a single quantum repeater node and presents a key milestone towards applications of optomechanical systems as quantum network nodes.

量子隐形传态，将未知输入状态忠实地转移到远程量子系统¹，是长距离量子通信协议²和分布式量子计算^3,4的关键组成部分。同时，高频纳米光机械系统^{5作为未来量子网络6}中的节点具有很大的前景，在具有长机械寿命的低损耗光学电信波长下在芯片上运行。最近的演示包括两个谐振器⁷之间的纠缠，一个量子存储器⁸和微波到光学转换^9,10,11. 尽管取得了这些成功，但将光学输入状态的量子隐形传态到长寿命的光机械存储器上仍然是一项突出的挑战。在这里，我们展示了偏振编码光学输入状态到一对纳米机械谐振器的联合状态的量子隐形传态。我们的协议还允许在双轨编码光机械量子存储器上存储和检索任意量子位状态。这项工作展示了单个量子中继器节点的全部功能，并为光机械系统作为量子网络节点的应用提供了一个关键里程碑。