GP2 - Birmingham Workshop Program: Classification And Signatures of Multi-gap Band Topologies Far From Equilibrium

Session Information

Location: Physics West 103 | School of Physics and Astronomy, University of Birmingham
Day: 1. Tuesday 21st April
Time: 17:00-18:00
Chairperson: N/A

Presentation Details

Presentation Type: Poster | 
Title: Classification And Signatures of Multi-gap Band Topologies Far From Equilibrium
Abstract: While the landscape of free-fermion phases has drastically been expanded in the last decades, recently novel multi-gap topological phases were proposed where groups of bands can acquire new invariants such as Euler class. As in conventional single-gap topologies, obstruction and dynamics play an inherent role and enrich the multi-gap topology which so far have been only incidentally addressed. We present a comprehensive theoretical classification to capture the obstruction effects on the multi-gap topology of Bloch systems and illuminate the out-of-equilibrium-signatures that arise as a consequence, which we also verified numerically. Our work presents a general framework to study the role of lattice configurations and obstructions on multi-gap topology that can be employed for arbitrary number bands or in higher dimensions and in out-of-equilibrium settings.

Presenter

Mr Osama Alsaiari
University of Cambridge | United Kingdom

Authors

1. Alsaiari, Osama | Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
2. Bouhoun, Adrien | Nordita, KTH Royal Institute of Technology and Stockholm University, Roslagstullsbacken 23, SE-106 91 Stockholm, Sweden
3. Slager, Robert-Jan | Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
4. Unal, F. Nur | School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom