r为任意变化的变量，依据此相似变换给出新的哈密顿量，\begin{eqnarray} \bar{H}=S^{-1} H S= ...
Anderson ModelPeriodic PotentialWe study a generalisation of the Hatano-Nelson Hamiltonian in which a periodic modulation of the site energies is present in addition to the usual random distribution. The system can then become localized by disorder or develop a band gap, and the eigenspectrum shows...
二者差别很大，作为对比，中间的图是厄米情形下的，这时二者的谱的差别不大，在长度趋于无穷大的·时候...
We obtain a duality between a generalized non-Hermitian Hatano-Nelson model in d-dimensional flat space and a Hermitian system in 2d-dimensional curved space, and give the metric of the curved space analytically. This duality shows the possibility of non-Hermiticity coming from the metric of the...