Functional renormalization group: Truncation schemes and quantum tunneling
โ Scribed by Michael Weyrauch
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 168 KB
- Volume
- 127
- Category
- Article
- ISSN
- 0167-7322
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๐ SIMILAR VOLUMES
We present an extension of the concepts of the functional renormalization group approach to quantum many-body problems in non-equilibrium situations. The approach is completely general and allows calculations for both stationary and time-dependent situations. As a specific example we study the stati
Using the one-loop functional renormalization group technique we evaluate the self-energy in the weak-coupling regime of the 2D t-t 0 Hubbard model. At van Hove (vH) band fillings and at low temperatures the quasiparticle weight along the Fermi surface (FS) continuously vanishes on approaching the (