在这项研究中，该研究团队提出一种寄存器，它使用光镊和光学晶格来确定地在光学腔中组装二维原子阵列。通过单个原子寻址光束，研究人员激发了每个原子的光子发射，并成功演示了多路原子-光子纠缠，实现了接近90%的产生到探测效率。结合空腔介导的量子逻辑，这一方法为分布式量子信息处理提供了一种可能的新途径。
据悉，量子计算和量子通信有望为用户提供经典物理无法实现的功能。然而，具有许多量子比特的大型系统的可扩展性是具有挑战性的。一种解决方案是开发一个量子网络，该网络由包含计算量子比特的小规模量子寄存器组成，这些量子寄存器可逆地与通信量子比特连接。
附：英文原文
Title: A quantum-network register assembled with optical tweezers in an optical cavity
Author: Lukas Hartung, Matthias Seubert, Stephan Welte, Emanuele Distante, Gerhard Rempe
Issue&Volume: 2024-07-12
Abstract: Quantum computation and quantum communication are expected to provide users with capabilities inaccessible by classical physics. However, scalability to larger systems with many qubits is challenging. One solution is to develop a quantum network consisting of small-scale quantum registers containing computation qubits that are reversibly interfaced to communication qubits. In this study, we report on a register that uses both optical tweezers and optical lattices to deterministically assemble a two-dimensional array of atoms in an optical cavity. Harnessing a single atom–addressing beam, we stimulate the emission of a photon from each atom and demonstrate multiplexed atom-photon entanglement with a generation-to-detection efficiency approaching 90%. Combined with cavity-mediated quantum logic, our approach provides a possible route to distributed quantum information processing.
DOI: 10.1126/science.ado647
Source: https://www.science.org/doi/10.1126/science.ado6471