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Mardi 09 juin, 2020 - 14:00

Emergent collective phenomena in many-body systems

Ipsita Mandal, Université de Stavanger, Norvège - en visio

par Revaz Ramazashvili - 9 juin 2020

Condensed matter physics is the physics of solids and liquids (condensed phases of matter). It is the study of the complex behaviour of a large number of interacting particles such that their collective behaviour gives rise to emergent properties. We will discuss some interesting quantum condensed matter systems with their intriguing emergent phenomena arising from complexity. We will revisit the Landau paradigm of Fermi liquid theory and hence understand the properties of the non-Fermi liquid systems which cannot be described within the Landau framework. In particular, we will focus on critical Fermi surface states where there is a well-defined Fermi surface, but no quasiparticle resulting from the strong interaction between the Fermi surface and a massless boson. As specific examples, we will focus on Ising-nematic and Fulde-Ferrell-Larkin-Ovchinnikov quantum critical points.