頁籤選單縮合
| 題 名 | Renormalization Group Approach to Self-Consistent-Field Approximation for the Interacting Electrons |
|---|---|
| 作 者 | Pao,C. H.; | 書刊名 | Chinese Journal of Physics |
| 卷 期 | 38:2(Part2) 民89.04 |
| 頁 次 | 頁375-379 |
| 分類號 | 330 |
| 關鍵詞 | |
| 語 文 | 英文(English) |
| 英文摘要 | Due to the retarded nature of the phonon-mediated electron-electron interaction, neither fast Fourier transform (FFT) nor previously developed NRG methods for Hubbard-type purely electronic models are applicable, while brute-force solutions are limited by the demands on computational time and storage which increase rapidly at low temperature T. A new numerical renormalization group (NRG) approach to the solution of self-consistent-field equations for correlated lattice electrons is illustrated for the two-dimensional Hubbard-type model. This approach allows us to handle the fermion frequency matrix inversions in the FLEX equations efficiently. Several orders of magnitude of CPU time and storage can be saved at the temperature scales relevant to electronic phase transitions. |
本系統中英文摘要資訊取自各篇刊載內容。