近日，美国哈佛大学Marko Lon?ar团队报道了具有单色中心的purcell增强自旋声子耦合。2026年5月6日出版的《自然》杂志发表了这一最新研究成果。

辐射体的辐射特性与其周围环境有着内在的联系。在辐射体周围放置电磁谐振器可以增强自发辐射，正如Purcell在20世纪40年代所提出的那样。这种方法如今在量子计算和通信中被常规用于将原子发射的光子引导到特定模式，并控制原子-光子相互作用。对于固态辐射体（如色心），其主体晶格引入了声学环境，使得激发态原子可以通过发射声子来弛豫。

研究组通过在金刚石中的一个色心自旋量子比特周围构建一个经过特殊设计的、微波频率的纳米机械谐振器，观察到了声学珀塞尔效应。利用该结构中与色心激发态强耦合的共局域光学模式，研究组在毫开尔文温度下进行单光子水平的激光光谱学测量，并发现当自旋量子比特调谐至与一个12 GHz的声学模式共振时，自旋弛豫速度加快了十倍。此外，研究组利用该色心作为原子尺度的探针，测量了该纳米结构高达28 GHz的宽带声子谱。该工作为固态量子缺陷的控制开辟了一个新机制，并为原子尺度量子存储器与编码在声学和超导器件中的量子比特之间的互连铺平了道路。

附：英文原文

Title: Purcell-enhanced spin–phonon coupling with a single colour centre

Author: Joe, Graham, Haas, Michael, Kuruma, Kazuhiro, Jin, Chang, Kang, Dongyeon Daniel, Ding, Sophie W., Chia, Cleaven, Warner, Hana, Pingault, Benjamin, Machielse, Bartholomeus, Meesala, Srujan, Lonar, Marko

Issue&Volume: 2026-05-06

Abstract: The radiative properties of emitters are inherently linked to their surrounding environment1. Placing an electromagnetic resonator around emitters can enhance spontaneous emission, as shown by Purcell in the 1940s2. This approach is now routinely used in quantum computing and communication to channel photons emitted by atoms into well-defined modes and control atom–photon interactions3,4,5,6,7,8,9. For solid-state emitters, such as colour centres, the host lattice introduces an acoustic environment, allowing excited atoms to relax by emitting phonons10,11. Here we observe the acoustic Purcell effect by constructing a specially engineered, microwave-frequency nanomechanical resonator around a colour-centre spin qubit in diamond. Using a co-localized optical mode of the structure that strongly couples to the excited state of the colour centre, we perform single-photon-level laser spectroscopy at millikelvin temperatures and observe a 10-fold faster spin relaxation when the spin qubit is tuned into resonance with a 12GHz acoustic mode. Moreover, we use the colour centre as an atomic-scale probe to measure the broadband phonon spectrum of the nanostructure up to 28GHz. Our work establishes a new regime of control for quantum defects in solids and paves the way for interconnects between atomic-scale quantum memories12 and qubits encoded in acoustic and superconducting devices13.

DOI: 10.1038/s41586-026-10495-7

Source: https://www.nature.com/articles/s41586-026-10495-7