196 citations · 1k across the 29 of their papers we have counts for
3 papers · 1 filter
Fourier transformation and response functions
O. Gunnarsson, G. Sangiovanni, A. Valli +1
We improve on Fourier transforms (FT) between imaginary time and imaginary frequency used in certain quantum cluster approaches using the Hirsch-Fye method. The asymptoti…
On the possible secondary component of the order parameter observed in London penetration depth measurements
Angelo Valli, Giorgio Sangiovanni, Massimo Capone +1
We discuss the effect of a secondary component of the superconducting order parameter on the superfluid density in the cuprates. If we assume a main gap, the most sta…
Dynamical vertex approximation for nanoscopic systems
Angelo Valli, Giorgio Sangiovanni, Olle Gunnarsson +2
With an increasing complexity of nanoscopic systems and the modeling thereof, new theoretical tools are needed for a reliable calculation of complex systems with strong electronic…