User:Cdahnken
About me:
I am new to Wikipedia, but I came about some articles that need improvement and I think I can contribute.
Articles to work at/prepare contributions:
- Additions to Hubbard Model
-- Analytic solutions possible in 1 and infinite dimensions
-- In 2D and 3D there is no analytic solution. 2D is the relevent case for high-tmeperature superconductivity.
-- Approximate solutions in 2D are for example: Hubbard solution (2nd order Greens function decoupling), Hartree-Fock type mean field solution ...
![{\displaystyle (\omega -\mu )G_{ij,\sigma }=\hbar \delta _{ij}+<<[c_{i,\sigma },H]_{-};c_{j,\sigma }^{\dagger }>>}](https://wikimedia.org/api/rest_v1/media/math/render/svg/0618e849481a35d0d4474192a0d95e6373fc7427)
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