A note on the Exact Green function for a quantum system decorated by two or more impurities

2017/02/16 by M. L. Glasser, Glasser, M. L.
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #FOS: Physical sciences #Quantum Physics (quant-ph) #Quantum and electron transport phenomena #Surface and Thin Film Phenomena

paper · pdf · doi:10.48550/arxiv.1702.05111

openalex publication_date 2017/02/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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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