近日，中北大学谭秋林团队报道了基于波导辅助光子散射的固态发射体预示确定性Knill-Laflamme-Milburn纠缠产生。该项研究成果发表在2025年11月20日出版的《物理评论A》杂志上。

据了解，利用多量子位纠缠的量子网络的实现为量子通信领域的变革性应用开辟了道路。

研究组提出了一套预先确定的协议，设计用于产生二量子位，三量子位和N量子位Knill-Laflamme-Milburn （KLM）状态的光子散射特性在一维波导-发射器系统。在每个协议中，辅助单光子作为通用接口连接所有静止量子比特。他们提出的协议允许通过触发探测器将由非理想耦合和频率失谐引起的不规则散射事件转换为可检测事件，这意味着他们的协议对于任意KLM状态的生成是有效的，具有预测操作特性和高保真度。由于量子发射体与纳米光子波导集成方面的重大突破，它们的协议具有理想的特性，使它们成为远程多量子位量子网络系统中部署的有希望的候选者。

附：英文原文

Title: Heralded deterministic Knill-Laflamme-Milburn entanglement generation for solid-state emitters via waveguide-assisted photon scattering

Author: Fang-Fang Du, Xin-Shan Du, Zhuo-Ya Bai, Qiu-Lin Tan

Issue&Volume: 2025/11/20

Abstract: The realization of quantum networks that exploit multiqubit entanglement opens avenues for transformative applications in the realm of quantum communication. In the paper, we present a set of heralded deterministic protocols designed for the generation of two-qubit, three-qubit, and N-qubit Knill-Laflamme-Milburn (KLM) states by the photon scattering property in one-dimensional waveguide-emitter system. In each protocol, the auxiliary single photon functions as a universal interface to bridge all stationary qubits. Our proposed protocols allow for the conversion of irregular scattering incidents occasioned by nonideal coupling and frequency detuning into detectable events by triggering the detectors, which means that our protocols are effective for the generation of arbitrary KLM states with the predictive operational character and high fidelity. Owing to the significant breakthroughs in the integration of quantum emitters with nanophotonic waveguides, our protocols possess ideal features that position them as the promising candidates for deployment in long-range multiqubit quantum network systems.

DOI: 10.1103/371q-1s8h

Source: https://journals.aps.org/pra/abstract/10.1103/371q-1s8h