近日，德国NVision量子技术公司Ilai Schwartz团队报道了单分子自旋光子界面。2026年10月28日，《自然》杂志发表了这一成果。

能够将长寿命自旋量子比特与光子耦合的光学接口，是量子组网与分布式量子信息处理的核心基础。目前，固态原子缺陷凭借其本征自旋相干性与光学相干性，成为最具前景的候选体系。在上述研究进展的基础上，经合成化学定制的分子体系为该领域带来根本性变革，可实现精准原子级调控与可重复的自下而上组装。然而，能够同时满足高性能自旋?光子接口全部要求的分子平台 —— 即同时兼具强荧光发射、高光谱稳定性以及长基态自旋寿命 —— 尚未在单分子层面得以实现。

研究组表明，将三重态基态卡宾分子嵌入结构匹配的主体晶体中，可构建具备单分子可寻址能力的高性能自旋?光子接口。该体系具有窄的零声子线、超过一小时的光谱稳定性、自旋选择光学跃迁，还可观测到单分子光探测磁共振信号。在4.5 K温度条件下，相干操控实现了毫秒量级动力学解耦相干时间，自旋弛豫时间可达数十毫秒。上述结果证实分子量子比特可作为单发射体量子光学的可行平台，同时保留了自下而上化学设计以及材料可加工性的优势。

附：英文原文

Title: A single-molecule spin–photon interface

Author: Roggors, Simon, Unden, Thomas, Aubele, Anna, Mentzel, Paul, Bayer, Gregor, Salhov, Alon, Scharpf, Jochen, Plenio, Martin B., Retzker, Alex, Jelezko, Fedor, Eichhorn, Tim R., Schaub, Tobias A., Pfender, Matthias, Neumann, Philipp, Schwartz, Ilai

Issue&Volume: 2026-10-28

Abstract: Optical interfaces that connect long-lived spin qubits to photons are a central requirement for quantum networking and distributed quantum information processing. At present, solid-state atomic defects are leading candidates because of their inherent spin and optical coherence1,2. Building on these advancements, synthetically tailored molecular systems represent a fundamental change in the field, using precise atomic control and consistent bottom-up assembly3,4. However, a molecular platform that concurrently satisfies the demands of a robust spin–photon interface—namely, the combination of bright fluorescence, high spectral stability and long ground-state spin lifetimes—has yet to be realized at the single-molecule level. Here we show that a triplet ground-state carbene molecule, embedded within a structurally matched host crystal, functions as a robust spin–photon interface with single-molecule addressability. The system exhibits narrow ZPLs, spectral stability over more than an hour, spin-selective optical transitions and single-molecule optically detected magnetic resonance. Coherent control yields millisecond-scale dynamical-decoupling coherence and tens-of-milliseconds spin relaxation at a temperature of 4.5K. These results establish molecular qubits as a viable platform for single-emitter quantum optics5,6 while preserving the advantages of bottom-up chemical design7 and processable materials8,9,10.

DOI: 10.1038/s41586-026-11147-6

Source: https://www.nature.com/articles/s41586-026-11147-6