An approximation to couplings on graphs

Taksu Cheon Pavel Exner

TBD mathscidoc:1910.43049

Journal of Physics A: Mathematical and General, 37, (29), L329, 2004.7
We discuss a general parametrization for vertices of quantum graphs and show, in particular, how the 's and 'couplings at an n-edge vertex can be approximated by means of n+ 1 couplings of the type provided the latter are properly scaled.
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@inproceedings{taksu2004an,
  title={An approximation to  couplings on graphs},
  author={Taksu Cheon, and Pavel Exner},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020123029696641578},
  booktitle={Journal of Physics A: Mathematical and General},
  volume={37},
  number={29},
  pages={L329},
  year={2004},
}
Taksu Cheon, and Pavel Exner. An approximation to couplings on graphs. 2004. Vol. 37. In Journal of Physics A: Mathematical and General. pp.L329. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020123029696641578.
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