[institut] Seminar SCL: N. Regnault on FQHE states

[Milica Milovanovic]

Postovane koleginice i kolege,

Nicolas Regnault 
Ecole Normale Supérieure, CNRS 

odrzace seminar Laboratorije za primenu racunara u nauci:

Anatomy of the fractional quantum Hall states 

dana 10.02.2010. u 12.00 u sali biblioteke Instituta za fiziku.

Sazetak seminara:

Understanding of numerous phenomena in physics or chemistry 
are based on the underlying fermionic or bosonic statistics. 
While statistics beyond these two have been predicted for 
more than twenty years, the experimental evidences of 
fractional or non-abelian statistics would be a major breakthrough. 
Experiments based on the fractional quantum Hall effect are 
on the verge of settling this question. 

We will show the theoretical evidences that indicate 
excitations of some fractional quantum Hall phases may obey 
such exotic statistics. While a large part of these arguments 
are based on numerical calculations, we will point out 
limitations of such an approach. We will try to describe some 
proposals to differentiate phases from finite size calculations. 
The complete information of a state lies in its symmetric monomial 
decomposition, but handling such huge amount of data has to be 
done in a clever way. The so-called entanglement spectra 
provide such technique. We will point out that they can go 
beyond overlap calculations to probe quantum phases. 


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Institute of Physics Belgrade
http://www.ipb.ac.rs/