论文标题
通过多级安德森杂质的非线性传输的费米液体理论
Fermi liquid theory for nonlinear transport through a multilevel Anderson impurity
论文作者
论文摘要
我们在Anderson杂质（$ n $ n $离散水平）上，在$ n_d $的任意电子中介绍了通过Anderson杂质的低能运输的微观Fermi-Liquid视图。它适用于非平衡电流波动，两数quasiparticle碰撞积分和确定准粒子能量转移起着重要作用的三体相关性。使用最高$ n = 6 $的数值重归其化组，我们发现，对于强相互作用，三体波动是由除Kondo Energy量表以外的单个参数确定的。它显着影响$ n> 2 $的当前噪声以及磁场中噪声的行为。
We present a microscopic Fermi-liquid view on the low-energy transport through an Anderson impurity with $N$ discrete levels, at arbitrary electron filling $N_d$. It is applied to nonequilibrium current fluctuations, for which the two-quasiparticle collision integral and the three-body correlations that determine the quasiparticle energy shift play important roles. Using the numerical renormalization group up to $N=6$, we find that for strong interactions the three-body fluctuations are determined by a single parameter other than the Kondo energy scale in a wide filling range $1 \lesssim N_d \lesssim N-1$. It significantly affects the current noise for $N>2$ and the behavior of noise in magnetic fields.
