Pumping Electron-Positron Pairs from a Well Potential.
Pumping Electron-Positron Pairs from a Well Potential.
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从势阱中泵送正负电子对
DOI：
10.1038/srep25292
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发表时间：
2016-04-29
影响因子：
4.6
通讯作者：
Fu LB
中科院分区：
文献类型：
--
作者：
Wang Q;Liu J;Fu LB
在极深阱势的存在下，电子将自发地占据空的嵌入束缚态，并且通过非微扰隧穿过程产生电子-正电子对。在这项工作中，通过缓慢振荡的宽度或深度，人口转移通道周期性地打开和关闭。我们发现并清楚地表明，通过粒子的非同步喷射，可以打破静态超临界阱中电子对数的饱和，并且可以从真空中以恒定的产生速率无限地抽运电子和正电子。在绝热极限下，一个周期后的最终对数是振荡上界的函数，临界上界表示束缚态的分裂点。
In the presence of very deep well potential, electrons will spontaneously occupy the empty embedded bound states and electron-positron pairs are created by means of a non-perturbative tunneling process. In this work, by slowly oscillating the width or depth, the population transfer channels are opened and closed periodically. We find and clearly show that by the non-synchronous ejections of particles, the saturation of pair number in a static super-critical well can be broken and electrons and positrons can be pumped inexhaustibly from vacuum with a constant production rate. In the adiabatic limit, final pair number after a single cycle has quantized values as a function of the upper boundary of the oscillating and the critical upper boundaries indicate the diving points of the bound states.