Non-Poissonian Ultrashort Nanoscale Electron Pulses
Non-Poissonian Ultrashort Nanoscale Electron Pulses
复制标题
非泊松超短纳米级电子脉冲
DOI：
10.1103/physrevlett.127.180602
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发表时间：
2021
影响因子：
8.6
通讯作者：
Batelaan, Herman
中科院分区：
文献类型：
--
作者：
Keramati, Sam;Brunner, Will;Gay, T. J.;Batelaan, Herman
当前技术中使用的电子束的统计特征，如粒子流所描述的，本质上是随机的。利用飞秒脉冲电子对的符合测量，我们报道了由双电子库仑相互作用引起的非随机的亚泊松电子统计的观测，这些统计显示出四分之一的反聚束信号。这一进展是观察到许多应用所需的强量子简并电子束的基本步骤，特别是电子相关光谱学。
The statistical character of electron beams used in current technologies, as described by a stream of particles, is random in nature. Using coincidence measurements of femtosecond pulsed electron pairs, we report the observation of sub-Poissonian electron statistics that are nonrandom due to two-electron Coulomb interactions, and that exhibit an antibunching signal of 1 part in 4. This advancement is a fundamental step toward observing a strongly quantum degenerate electron beam needed for many applications, and in particular electron correlation spectroscopy.