تقرير
Exchange-correlation energy from Green's functions
| العنوان: | Exchange-correlation energy from Green's functions |
|---|---|
| المؤلفون: | Crisostomo, Steven, Gross, E. K. U., Burke, Kieron |
| سنة النشر: | 2024 |
| المجموعة: | Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Physics - Chemical Physics, Quantum Physics |
| الوصف: | DFT calculations yield useful ground-state energies and densities, while Green's function techniques (such as $GW$) are mostly used to produce spectral functions. From the Galitskii-Migdal formula, we extract the exchange-correlation of DFT directly from a Green's function. This spectral representation provides an alternative to the fluctuation-dissipation theorem of DFT, identifying distinct single-particle and many-particle contributions. Results are illustrated on the uniform electron gas and the two-site Hubbard model. |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2403.03364 |
| رقم الأكسشن: | edsarx.2403.03364 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |