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Theoretical Spectroscopy Lectures

Electronic excitations are probed by experimental techniques such as optical absorption, EELS and photo-emission (direct or inverse). From the theory point of view, excitations and excited state properties are out of the reach of density-functional theory (DFT), which is a ground-state theory. In the last twenty years other ab-initio theories and frameworks, which are able to describe electronic excitations and spectroscopy, have become more and more used: time-dependent density-functional theory (TDDFT) and many-body perturbation theory (MBPT) or Green's function theory (GW approximation and Bethe-Salpeter equation BSE). In fact, computational solutions and codes have been developed in order to implement these theories and to provide tools to calculate excited state properties.The present school focuses on these points, covering theoretical, practical, and also numerical aspects of TDDFT and MBPT, and codes implementing them (ABINIT, DP, EXC).

New Release: v3.1
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A new version of the code has been released: v3.1. Few changes and some bug corrections for this intermediate release.

New Release v3.0
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A new version of the code has been released: v3.0.

Theoretical Spectroscopy Lectures
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Electronic excitations are probed by experimental techniques such as optical absorption, EELS and photo-emission (direct or inverse).

Cecam School on Theoretical Spectroscopy
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Theoretical Spectroscopy Lectures: Theory and Codes