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SUMMARY:Quantum phase transitions in disordered topological insulators and  superconductors
DESCRIPTION:I'll talk about quantum criticality in the quasi one-dimensional 
topological Anderson insulators and superconductors. It turns out that 
the systems may be fully described in terms of two parameters (g,χ) 
representing localization and topological properties, respectively. 
Surfaces of half-integer valued χ define phase boundaries between 
distinct topological sectors. Upon increasing system size, the two 
parameters exhibit flow similar to the celebrated two parameter flow 
describing the quantum Hall transitions. However, unlike the quantum 
Hall system, an exact analytical description of the entire phase diagram 
can be given. We check the quantitative validity of our theory by 
comparison to numerical transfer matrix computations.
LOCATION:Erwin Schrödinger Saal
DTSTART:20140804T100000
DTEND:20140804T110000
TZID: Europe/Vienna
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