Speaker
Description
Quantum impurity models are key platforms for studying strong electronic correlations and can be realized with high precision in quantum-dot experiments. While the low-transparency (weak-coupling) regime is well understood—particularly using the Numerical Renormalization Group—the opposite limit of highly transparent contacts has remained largely unexplored.
In this talk, I show how the functional renormalization group (FRG) provides a controlled description of the highly transparent regime. In the three-channel charge Kondo model, the FRG reproduces known universal low-energy results (obtained from conformal field theory) and captures the full crossover from high to low energies. Our results establish the FRG as a powerful nonperturbative tool for quantum impurity systems in previously inaccessible regimes.
| Affiliation | LPTMC Sorbonne Université |
|---|---|
| Link to paper | Phys. Rev. Lett. 136, 066501 |
| Career status | PhD student |