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- W2231189547 abstract "We give details on how to calculate spectral functions and Green's functions for finite systems using the Chebyshev polynomial expansion method. We apply the method to a finite Anderson impurity system, and furthermore give details on how to exploit its symmetry to transform the system into smaller orthogonal subsystems. We also consider systems connected to infinite leads, which we study by approximating the unknown self-energy with an exact self-energy for a finite system. As our test case, we consider the single-impurity Anderson model, where we find that we can capture some aspects of Kondo physics." @default.
- W2231189547 created "2016-06-24" @default.
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- W2231189547 date "2015-11-03" @default.
- W2231189547 modified "2023-09-27" @default.
- W2231189547 title "Computing Exact Self-Energies with Polynomial Expansion" @default.
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- W2231189547 hasPublicationYear "2015" @default.
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