Theoretical Methods For Strongly Correlated Electrons
| Title | Theoretical Methods For Strongly Correlated Electrons |
| Publication Type | Book Chapter |
| Year of Publication | 2004 |
| Authors | Allen S, Tremblay A-MS, Vilk YM |
| Editor | Sénéchal D, Tremblay A-MS, Bourbonnais C |
| Chapter | Conserving approximations vs. two-particle self-consistent approach |
| Pagination | 341–355 |
| Publisher | Springer |
| Abstract | The conserving approximation scheme to many-body problems was developed by Kadanoff and Baym using the functional-derivative approach. Another approach for the Hubbard model also satisfies conservation laws, but in addition it satisfies the Pauli principle and a number of sum rules. A concise formal derivation of that approach, using functional derivatives, is given in this conference paper to highlight formal analogies and differences with conserving approximations. |
