AI 中文总结
该研究利用金刚石中约10^4个NV中心的集体多体动力学，实现了计量增益达7.9(2) dB的磁信号检测与8.8(3) dB的磁噪声传感，开发出可检测低至50纳米空间关联磁噪声的动量空间分辨传感模式，为相关量子传感器应用开辟了道路。
AI 中文摘要
多体动力学是一种在量子粒子间构建关联的有前景方法，可应用于传感和计量学领域。然而，在实际场景中利用该方法实现显著增益颇具挑战，迄今为止仅实现了极少数应用。本文展示了一种由室温固体中强相互作用电子自旋实现的纳米级磁传感方法：通过利用脉冲磁场梯度相干控制金刚石中约10^4个氮-空位（NV）中心构成的偶极系综的集体多体动力学，在充分考虑实验开销的情况下，实现了磁信号检测的计量增益达7.9(2) dB、磁噪声传感的计量增益达8.8(3) dB；最后，将这些方法结合，展示了动量空间分辨传感模式，可在连续可调的长度尺度（低至50纳米）下检测空间关联的磁噪声。这些发现为相互作用增强型量子传感器在纳米级生物成像和材料表征中的实际应用开辟了道路。
英文摘要
Many-body dynamics constitutes a promising approach for creating correlations between quantum particles which can be used for applications in sensing and metrology. However, utilizing this potential for substantial gains in practical settings is a challenging task with only a very few applications realized to date. Here, we demonstrate an approach to nanoscale magnetic sensing enabled by strongly interacting electronic spins in a room temperature solid. By coherently controlling collective many-body dynamics of a dipolar ensemble of $\sim 10^4$ nitrogen-vacancy (NV) centres in diamond with pulsed magnetic field gradients, we demonstrate practical metrological gain up to $7.9(2)\,\mathrm{dB}$ for magnetic signal detection and $8.8(3)\,\mathrm{dB}$ for magnetic noise sensing, fully accounting for experimental overheads. Finally, we combine these methods to demonstrate a momentum-space-resolved sensing modality that enables detection of spatially correlated magnetic noise at continuously tunable length scales down to 50 nanometers. These observations open the door toward practical applications of interaction-enhanced quantum sensors for nanoscale biological imaging and material characterization.
