AI 中文总结
该研究提出一种利用自由电子-光子相互作用的电子梳状基投影测量方案，结合明亮压缩真空态与强PINEM耦合实现高精度，对电子量子比特无破坏性，可用于量子误差缓解等应用，开辟了量子自由电子研究新方向。
AI 中文摘要
随着光子诱导近场电子显微镜（PINEM）的快速发展，驱动的自由电子已成为量子信息处理的有前途平台，包括量子计算和量子传感。然而，依赖电子能量损失谱（EELS）的常规测量对电子量子比特具有固有破坏性，从而限制了其适用性。在本文中，我们提出了一种对电子梳状基进行投影测量的方案，利用明亮压缩真空态和强PINEM耦合可实现高测量精度。值得注意的是，该方法不仅对电子量子比特无破坏性，且与能量测量最大程度不相容，可实现量子误差缓解和爱因斯坦-波多尔斯基-罗森（EPR）操控检测等替代量子信息应用。我们的发现为系统理解量子自由电子以及开发无破坏性自由电子量子信息任务开辟了途径。
英文摘要
Free electrons, driven by rapid advances in photon-induced near-field electron microscopy, have emerged as a promising platform for quantum information processing, including quantum computing and quantum sensing. However, conventional measurements that rely on the electron energy loss spectrum (EELS) are inherently destructive to electron qubits, thereby constraining their applicability. In this Letter, we propose a scheme that performs projection measurement on the electron comb basis, where high measurement precision can be achieved with bright squeezed vacuum states and strong PINEM couplings. Notably, this approach is not only nondestructive to electron qubits but also maximally incompatible with energy measurements, enabling alternative quantum information applications, such as quantum error mitigation and Einstein-Podolsky-Rosen steering detection. Our findings open an avenue towards a systematic understanding of quantum free electrons and towards the development of nondestructive free electron quantum information tasks.
