论文标题
伪用方法用于费尔米金环境的确切描述：从单分子电子到近代共振
A pseudo-fermion method for the exact description of fermionic environments: from single-molecule electronics to Kondo resonance
论文作者
论文摘要
我们开发了一种离散的费用方法，用于建模与连续电子储层相互作用的任意系统的强相互作用。该方法基于连续浴相关函数的伪屈服分解，并且仅受此分解的准确性的限制。我们表明，要获得这种分解，可以允许假想的伪用参数，并在单个伪屈服中进行强阻尼，而无需引入不需要的近似值。对于非相互作用的单回合水平，我们针对分析解决方案和精确的层次方程方法进行基准测试。我们还表明，对于相互作用的情况，这种简单的方法可以捕获近相共振的强相关的低温物理。
We develop a discrete fermion approach for modelling the strong interaction of an arbitrary system interacting with continuum electronic reservoirs. The approach is based on a pseudo-fermion decomposition of the continuum bath correlation functions, and is only limited by the accuracy of this decomposition. We show that to obtain this decomposition one can allow for imaginary pseudo-fermion parameters, and strong damping in individual pseudo-fermions, without introducing unwanted approximations. For a non-interacting single-resonant level, we benchmark our approach against an analytical solution and an exact hierachical-equations-of-motion approach. We also show that, for the interacting case, this simple method can capture the strongly correlated low-temperature physics of Kondo resonance.
