Séminaires du mardi 10 avril

Séminaire du LPTMS: Leonardo Mazza


Majorana zero modes in one-dimensional Ytterbium quantum gases

Leonardo Mazza (Département de Physique, ENS, Paris)

After their introduction in the context of the relativistic Dirac equation, Majorana fermions have recently experienced a renewed interest for their relevance in the description of topological superconducting models, where they appear as Majorana zero modes. In this talk I will investigate the possibility of realizing Majorana zero modes in cold-atom experiments, and in particular I will argue that one-dimensional Ytterbium gases offer a natural experimental playground for their experimental implementation. Reference:
  • [1] F. Iemini, L. Mazza, L. Fallani, P. Zoller, R. Fazio and M. Dalmonte, Majorana Quasiparticles Protected by 2 Angular Momentum Conservation, Phys.Rev.Lett. 118 200404 (2017)

Séminaire du LPTMS: Jacopo de Nardis


Edge singularities and quasi-long-range order in non-equilibrium steady states

Jacopo de Nardis (LPT-ENS, Paris)

I will present a theoretical study of exotic states of matter realized via the bi-partite quantum quench protocol, where two many-body systems at different density or temperatures are put in contact. I will mostly focus on the 1d interacting Bose gas and I will show how the non-equilibrium steady state emerging from the junction displays strong quantum correlations that are more typical of gapless ground states than thermal states in one spacial dimension. I will then show how by means of new form factors techniques we can provide a full characterization of the strong edge singularities which in principle could also be studied via universal field theory methods similar to non-linear Luttinger liquids. Ref: