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• 29 October
  [Institut Quantique] IQ/RQMP : Maia G. Vergniory
  29 October

  [Institut Quantique] IQ/RQMP : Maia G. Vergniory

  Location : Description : Vidéoconférence, Zomm #: 892019835 (Zoom link)Lorsque demandé, indiquer 'zéro zéro deux quatre sept deux' en chiffre.Beyond Topological Quantum ChemistryMaia G. VergnioryDonostia International Physics Center, Donostia-San Sebastian, SpainIkerbasque, Basque Foundation for Science, Bilbao, SpainTopological quantum chemistry (TQC) framework has provided a complete description ofthe universal properties of all possible atomic band insulators in all space groupsconsidering the crystalline unitary symmetries. It links the chemical and symmetrystructure of a given material with its topological properties. While this formalism filledthe gap between the mathematical classification and the practical diagnosis oftopological materials, an obvious limitation is that it only applies to weakly interactingsystems. It is an open question to which extent this formalism can be generalized tostrongly correlated system that can exhibit symmetry protected topological Mottinsulators. In this talk I will first introduce TQC and its application and then I will addressthis question by combining cluster perturbation theory and topological Hamiltonians withinTQC. This simple formalism will be applied to calculate to the phase diagram of theHubbard model for a diamond chain. The results are compared to numerically exactcalculations from density matrix renormalization group and variational Monte Carlosimulations together with many-body topological invariants.References[1] M.G. Vergniory, L. Elcoro, C. Felser, N. Regnault, B.A. Bernevig, Z. Wang , “A complete catalogue of High-Quality Topological Materials “, Nature 566, 480-485 (2019)[2] B. Bradlyn, L. Elcoro, J. Cano, M.G. Vergniory, Z. Wang, C. Felser,

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• 02 November
  [Institut Quantique] MatQ:
  02 November

  [Institut Quantique] MatQ:

  Location : Description : https://umontreal.zoom.us/j/93026432919?pwd=SkVyQ2w2Z3Q2SW5CcjJQa2QwVlRsZz09 Meeting ID: 930 2643 2919Password: 137

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• 03 November
  [Institut Quantique] InfoQ – Groupes Blais/Juan
  03 November

  [Institut Quantique] InfoQ – Groupes Blais/Juan

  Location : Description : Rejoindre la réunion Microsoft Teams  

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