具有非线性色散的手征一维系统中的电子-等离激元散射
Electron-Plasmon scattering in chiral 1D systems with nonlinear dispersion
摘要：
我们研究实现的无自旋一维手征费米子系统，例如，电子马赫-曾德尔干涉仪的臂中，在高能量下。考虑到费米子光谱的曲率和有限的相互作用范围，我们发现了一个新的散射机制，高能电子散射等离子体激元（密度激发）。这导致了单粒子格林函数的指数衰减，即使在零温度下也具有能量依赖的速率。作为这个电子等离子体散射通道的结果，我们观察到的相干激发的等离子体波在一个高能量的电子导致的单色正弦密度图案的积累的唤醒。
英文摘要：
We investigate systems of spinless one-dimensional chiral fermions realized, e.g., in the arms of electronic Mach-Zehnder interferometers, at high energies. Taking into account the curvature of the fermionic spectrum and a finite interaction range, we find a new scattering mechanism where high-energy electrons scatter off plasmons (density excitations). This leads to an exponential decay of the single-particle Green's function even at zero temperature with an energy-dependent rate. As a consequence of this electron-plasmon scattering channel, we observe the coherent excitation of a plasmon wave in the wake of a high-energy electron resulting in the buildup of a monochromatic sinusoidal density pattern.
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