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Lehmann representation
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Low Rank Approximation in Electron Excitation Calculations - IPAM at UCLA
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- 1 LOW RANK APPROXIMATION IN ELECTRON EXCITATION CALCULATIONS
- 2 Outline
- 3 Quantum many-body problem and electron excitation
- 4 Lehmann representation
- 5 BSE Hamiltonian
- 6 Integral computation: the matrix view
- 7 Interpolative Separable Density Fitting
- 8 Computing ISDF
- 9 Take advantage of separability
- 10 Choosing interpolation points
- 11 Extended (periodic) systems
- 12 ISDF for periodic systems
- 13 Examples (non-periodic systems)
- 14 The ranks of pair product basis (CO)
- 15 Accuracy vs rank truncation (Six)
- 16 Optical absorption spectrum
- 17 ISDF Efficiency
