Point scatterers in low number of dimensions
介观与纳米尺度物理
2007-05-23 v1
摘要
It is well known that in 1D the cross section of a point scatterer increases along with the scatterer's strength (potential). In this paper we show that this is an exceptional case, and in all the other cases, where a point defect has a physical meaning, i.e., 0<d<1 and 1<d<=2 (d is the dimensions number), the cross section does not increase monotonically with the scatterer's strength. In fact, the cross section exhibits a resonance dependence on the scatterer's strength, and in the singular 2D case it gets its maximum value for an infinitely weak strength. We use this fact to show that two totally different generalized functions can describe exactly the same physical entity (the same scatterer).
引用
@article{arxiv.cond-mat/0408641,
title = {Point scatterers in low number of dimensions},
author = {Er'el Granot},
journal= {arXiv preprint arXiv:cond-mat/0408641},
year = {2007}
}
备注
4 pages, RevTex