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SUMMARY:Excited states properties of materials from many-body perturbation
  theory - Myrta Grüning\, Queen's University Belfast
DTSTART:20230605T133000Z
DTEND:20230605T140000Z
UID:TALK202198@talks.cam.ac.uk
CONTACT:Maria-Andreea Filip
DESCRIPTION:Density-functional theory (DFT) is a standard tool to investig
 ate the properties of electronic systems. In spite of its success due to t
 he advantageous polynomial scaling with the size of the system\, DFT is a 
 ground-state theory and though it is routinely applied to calculate excite
 d state properties\, its accuracy is inevitably limited. The past two deca
 des have seen the developments of approaches based on many-body perturbati
 on theory used in combination with DFT to predict excited states propertie
 s of materials. Rather than the ground-state density – which in principl
 es gives access to any ground-state property of an electron system – the
  key quantities of these approaches are the one-particles and two-particle
 s Green’s functions which are closely related to the relevant excited st
 ate processes. In this lecture\, I will introduce some key ideas behind th
 ese approaches and show how they are used in practice for predicting mater
 ials’ properties. To conclude\, I will offer a perspectives on some curr
 ent developments in the field.
LOCATION:Zoom link: https://zoom.us/j/92447982065?pwd=RkhaYkM5VTZPZ3pYSHpt
 UXlRSkppQT09
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