| Autor: |
De Baerdemacker, Stijn, Ayati, Amir, Burton, Hugh G. A., De Vriendt, Xeno, Bultinck, Patrick, Acke, Guillaume |
| Rok vydání: |
2023 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| Popis: |
We present a mathematical analysis of the spin-constrained Hartree-Fock solutions (CHF) of the 2-site Hubbard model. The analysis sheds light on the spin symmetry breaking process around the Coulson-Fischer point. CHF states are useful as input states for the Generator Coordinate Method (GCM) in which CHF states can be used as a basis for multiconfigurational calculations in the Hill-Wheeler equations. The spin degree of freedom provides the generator coordinate in the GCM related to static electron correlation. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
