360 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of MinhoPT56 papers
- Universidade do PortoPT36 papers
- University of LisbonPT17 papers
- International Iberian Nanotechnology LaboratoryPT14 papers
- Instituto Superior TécnicoPT13 papers
- QuantaLabPT11 papers
- Centre National de la Recherche ScientifiqueFR10 papers
- Columbia UniversityUS10 papers
- Institució Catalana de Recerca i Estudis AvançatsES10 papers
- University of AveiroPT10 papers
- Beijing Computational Science Research CenterCN9 papers
- Institut des Hautes Études ScientifiquesFR9 papers
Showing 2017 · cond-mat.otherShow all
2 papers · 2 filters
cond-mat.other2017★ 99 cited
Nonlinear optical responses of crystalline systems: Results from a velocity gauge analysis
D. J. Passos, G. B. Ventura, J. M. Viana Parente Lopes +2
In this work, the difficulties inherent to perturbative calculations in the velocity gauge are addressed. In particular, it is shown how calculations of nonlinear optical responses…
cond-mat.other2017★ 124 cited
Gauge covariances and nonlinear optical responses
G. B. Ventura, D. J. Passos, J. M. B. Lopes dos Santos +2
The formalism of the reduced density matrix is pursued in both length and velocity gauges of the perturbation to the crystal Hamiltonian. The covariant derivative is introduced as…