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Understanding interacting many-particle systems: accurate theories for liquids and electronic excitations in solids

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Despite the simplicity of their microscopic constituents, electrons and nuclei, the theoretical modeling of condensed matter systems is very difficult. The origin of the problem is that a very large number of particles are interacting with each other. In my talk, I will discuss various theoretical approaches to deal with interacting many-particle systems. In the first part, I will introduce a new method to describe molecular liquids, such as water, which plays an important role in biophysics and electrochemistry. In the second part, I will describe recent theories of electronic excitations in materials. Specifically, I will show how an accurate description of the interaction between electrons and plasmons, quantized charge density oscillations, can explain recent photoemission experiments in doped graphene and silicon.

This talk is part of the Electronic Structure Discussion Group series.

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