Tag Archives: third harmonic generation
Nonlinear response of solids within the GW plus Bethe-Salpeter approximation
![](https://www.attaccalite.com/wp-content/uploads/2015/07/nonlinear-response-of-solids-within-the-gw-plus-bethesalpeter-approximation-1-638-150x150.jpg)
My new talk for the GDR-Corr is available online. In this talk I will present our new (probably not so new now) approach to calculate non-linear response in extended systems within the GW plus Bethe-Salpeter equation. I put different references in the presentation that can be interesting for the reader.
Nonlinear optics by means of the dynamical Berry-phase
![](https://www.attaccalite.com/wp-content/uploads/2013/09/Si_absX3-AB_IP_vs_Moss.png)
We present an ab-initio real-time based computational approach to nonlinear optical properties in Condensed Matter systems[1]. The equation of motions, and in particular the coupling of the electrons with the external electric field, are derived from the Berry phase formulation of the dynamical polarization.[2] The zero-field Hamiltonian includes crystal local field effects and the renormalization… Read More