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SUMMARY:CECAM School:"Theoretical Spectroscopy Lectures"
DTSTART;VALUE=DATE:20240311
DTSTAMP:20260407T051217Z
UID:6153bb866a82e40e56bb63cc6c5966d88d1522d2bcfff9fc429f3c61
CATEGORIES:Conferences - Seminars
DESCRIPTION:You can apply to participate and find all the relevant informa
 tion (speakers\, abstracts\, program\,...) on the event website: https://
 www.cecam.org/workshop-details/1195\n*** INFO *** : Please notice that for
  the schools\, the registration is mandatory and the available spaces are
  limited!\n\nDescription\n\nAb Initio Theoretical Spectroscopy\nThe inter
 action of matter with radiation (photons or electrons) is a fundamental ex
 perimental tool to study materials\, both to understand their properties a
 nd to tune new functionalities for technological applications. Experimenta
 l spectroscopy\, such as photoemission\, optical absorption\, X-ray and el
 ectron energy-loss\, etc. probe electronic excitations. Density-functional
  theory (DFT)\, the standard model of condensed matter physics\, can descr
 ibe with good approximation the ground-state atomic structure\, total ener
 gy\, electronic density\, phonon frequencies\, etc. On the other hand\, DF
 T cannot access electronic excitations and excited-state properties\, one 
 should go beyond DFT. In the last twenty years\, other ab initio theorie
 s able to describe excitations and spectroscopy\, have become available an
 d more and more used: time-dependent density-functional theory (TDDFT) and
  many-body perturbation theory (MBPT) or Green function theory (GW approxi
 mation and Bethe-Salpeter equation BSE). Algorithms and codes have been de
 veloped to implement these theories and to provide computational solutions
  to calculate excitations\, excited state properties and spectra. The latt
 er have recently started to constitute a database for new paradigms such a
 s high-throughput (HT) and machine learning (ML) techniques. Within this s
 cientific framework\, the present school aims at covering theoretical and 
 numerical aspects of TDDFT and MBPT\, up to HT and ML outcomes\, resorting
  also to practical hands-on codes (ABINIT\, DP\, 2Light\, EXC) implementin
 g them.\nKeywords:\n\n	Electronic excitations and spectroscopy techniques:
  experiment vs theory\;\n	Time-dependent density-functional theory (TDDFT)
 \, exchange-correlation kernels\;\n	Ab initio Green functions\, many-body
  perturbation theory (MBPT)\;\n	GW self-energy\, COHSEX\, Bethe-Salpeter 
 equation (BSE)\;\n	Out-of-equilibrium and non-linear (under intense laser)
  spectroscopy.\n\nReference\n[1] Richard M. Martin\, "Electronic Structure
 : Basic Theory and Practical Methods"\, Cambridge University Press\, Cambr
 idge\n[2] R. M. Martin\, L. Reining\, and D. M. Ceperley\, "Interacting El
 ectrons"\, Cambridge Univ. Press\, Cambridge (2016).\n[3] F. Aryasetiawan\
 , O. Gunnarsson\, Rep. Prog. Phys.\, 61\, 237-312 (1998)\n[4] G. Onida\, 
 L. Reining\, A. Rubio\, Rev. Mod. Phys.\, 74\, 601-659 (2002)\n[5] G. Str
 inati\, Riv. Nuovo Cim.\, 11\, 1-86 (1988)
LOCATION:BCH 2103 https://plan.epfl.ch/?room==BCH%202103
STATUS:CONFIRMED
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