量子速调管--调制电子束控制量子系统
A Quantum Klystron -- Controlling Quantum Systems with Modulated Electron Beams
摘要：
量子跃迁的相干控制--量子技术中不可或缺的--通常依赖于量子系统与电磁辐射的相互作用。在这里，我们从理论上证明了时间调制的自由空间电子束的非辐射电磁近场可以用于量子系统的相干控制。我们表明，这样的操作可以进行只有经典的控制电子束本身，是很容易实现与当前的技术。这种方法可以利用电子的小德布罗意波长，提供一种具有纳米级空间分辨率的光谱选择性量子控制的途径。
英文摘要：
Coherent control of quantum transitions -- indispensable in quantum technology -- generally relies on the interaction of quantum systems with electromagnetic radiation. Here, we theoretically demonstrate that the non-radiative electromagnetic near-field of a temporally modulated free-space electron beam can be utilized for coherent control of quantum systems. We show that such manipulation can be performed with only classical control over the electron beam itself, and is readily realizable with current technology. This approach may provide a pathway towards spectrally selective quantum control with nano-scale spatial resolution, harnessing the small de Broglie wavelength of electrons.
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