论文标题
干扰和射击噪声在堕落的安德森 - 霍尔斯坦模型中
Interference and shot noise in a degenerate Anderson-Holstein model
论文作者
论文摘要
我们研究具有轨道变性的安德森 - 霍尔斯坦模型的运输特性和一个允许形成黑态的隧道阶段。产生的破坏性干扰产生了具有增强的射击噪声的正差分和负差分电导特征的特征模式，而耦合与导线的耦合中没有进一步的不对称要求。运输特征受到哈密顿系统的羔羊移位重新归一化的强烈影响。因此，电子 - 频率耦合无法通过泊松分布的当前步骤的简单拟合来提取。对于强烈的振动松弛，具有分析溶液的更简单的有效模型可以更好地理解，此外，证明了所描述效果的鲁棒性。
We study the transport properties of an Anderson-Holstein model with orbital degeneracies and a tunneling phase that allows for the formation of dark states. The resulting destructive interference yields a characteristic pattern of positive and negative differential conductance features with enhanced shot noise, without further asymmetry requirements in the coupling to the leads. The transport characteristics are strongly influenced by the Lamb-shift renormalization of the system Hamiltonian. Thus, the electron-vibron coupling cannot be extracted by a simple fit of the current steps to a Poisson distribution. For strong vibronic relaxation, a simpler effective model with analytical solution allows for a better understanding and moreover demonstrates the robustness of the described effects.
