Summing parquet diagrams via the functional renormalization group: x-ray problem revisited

@article{Lange2015SummingPD,
  title={Summing parquet diagrams via the functional renormalization group: x-ray problem revisited},
  author={P. Lange and Casper Drukier and Anand Sharma and P. Kopietz},
  journal={Bulletin of the American Physical Society},
  year={2015}
}
We present a simple method for summing so-called parquet diagrams of fermionic many-body systems with competing instabilities using the functional renormalization group. Our method is based on partial bosonization of the interaction using multi-channel Hubbard–Stratonovich transformations. A simple truncation of the resulting flow equations, retaining only the frequency-independent parts of the two-point and three-point vertices amounts to solving coupled Bethe–Salpeter equations for the… Expand

Figures from this paper

References

SHOWING 1-10 OF 48 REFERENCES
...
1
2
3
4
5
...