TY  - CONF
AU  - DiVincenzo, David
TI  - Topological Trouble: The Problem with Braiding Majoranas
PB  - Chalmers University
M1  - FZJ-2017-08181
PY  - 2017
AB  - I will begin with a general discussion of anyons, of which Majoranas are an example.  I continue with a discussion of why particle statistics in 2D can be neither bosonic nor fermionic, nor even abelian, and what it means for the charge to be fractional.  A simple model of Kitaev, of electrons hopping on a branched 1D lattice with strong spin-orbit coupling and superconducting pairing, is sufficient to describe Majoranas and the gates that can be done by moving them around each other (braiding).  I discuss a model calculation of the decohence of these Majorana qubits during braiding in a trijunction, due to thermally generated quasiparticles (bosonic environment).  The limitations to coherence are significant; topological protection doesn't really work in this scenario.  (work with Dr. Fabio Pedrocchi)
T2  - Kolloquium
CY  - 7 Dec 2017 - 8 Dec 2017, Goetheburg (Schweden)
Y2  - 7 Dec 2017 - 8 Dec 2017
M2  - Goetheburg, Schweden
LB  - PUB:(DE-HGF)31
UR  - https://juser.fz-juelich.de/record/841081
ER  -