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Corpus ID: 230433739

Computing local multipoint correlators using the numerical renormalization group

@inproceedings{Lee2021ComputingLM,
title={Computing local multipoint correlators using the numerical renormalization group},
author={Seung-Sup B. Lee and Fabian B. Kugler and J. Delft},
year={2021}
}

Local threeand four-point correlators yield important insight into strongly correlated systems and have many applications. However, the non-perturbative, accurate computation of multipoint correlators is challenging, particularly in the real-frequency domain for systems at low temperatures. In an accompanying paper, we introduce generalized spectral representations for multipoint correlators. Here, we develop a numerical renormalization group (NRG) approach, capable of efficiently evaluating… Expand