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SUMMARY:Non-Abelian braiding of phonons from first principles - Bo Peng\, 
 Cavendish Laboratory\, University of Cambridge
DTSTART:20220523T130000Z
DTEND:20220523T133000Z
UID:TALK173042@talks.cam.ac.uk
CONTACT:Dr M. Simoncelli
DESCRIPTION:Non-Abelian braiding of quasiparticles can encode quantum info
 rmation immune from environmental noise with the potential to realize topo
 logical quantum computation. Here we propose that phonons\, a bosonic exci
 tation of lattice vibrations\, can carry non-Abelian charges in their band
  structures that can be braided using external stimuli. Taking some earthl
 y abundant materials such as silicates [1] and aluminium oxide [2] as repr
 esentative examples\, we demonstrate that an external electric field or el
 ectrostatic doping can give rise to phonon band inversions that induce the
  redistribution of non-Abelian charges\, leading to non-Abelian braiding o
 f phonons. We show that phonons can be a primary platform to study non-Abe
 lian braiding in the reciprocal space\, and we expand the toolset to study
  such braiding processes.\n\nReferences:\n\n[1] Bo Peng\, Adrien Bouhon\, 
 Bartomeu Monserrat & Robert-Jan Slager. Nature Communications 13\, 423 (20
 22).\n\n[2] Bo Peng\, Adrien Bouhon\, Robert-Jan Slager & Bartomeu Monserr
 at. Physical Review B 105\, 085115 (2022).
LOCATION:Venue to be confirmed
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