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An approximation to δ' couplings on graphs
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An approximation to δ' couplings on graphs
classification
quant-ph
cond-mat.mes-hallmath-phmath.MP
keywords
deltacouplingsgraphsapproximatedapproximationcouplingdiscussedge
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We discuss a general parametrization for vertices of quantum graphs and show, in particular, how the $\delta'_s$ and $\delta'$ coupling at an $n$ edge vertex can be approximated by means of $n+1$ couplings of the $\delta$ type provided the latter are properly scaled.
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