A note on the Exact Green function for a quantum system decorated by two or more impurities
classification
🪐 quant-ph
keywords
functionimpuritiesgreendecoratedexactquantumsystemamplitude
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The exact Green function is constructed for a quantum system, with known Green function, which is decorated by two delta function impurities.It is shown that when two such impurities coincide they behave as a single singular potential with combined amplitude. The results are extended to N impurities.
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