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TT: Fachverband Tiefe Temperaturen

TT 33: Low-dimensional Systems - Models II

TT 33.6: Talk

Friday, March 30, 2007, 11:30–11:45, H18

Entanglement entropy in fermionic Laughlin states — •Masud Haque — MPI-PKS, Dresden, Germany

We present analytic and numerical calculations on the bipartite entanglement entropy in fractional quantum Hall states of the fermionic Laughlin sequence. The partitioning of the system is done both by dividing Landau level orbitals and by grouping the fermions themselves. For the case of orbital partitioning, our results can be related to spatial partitioning, enabling us to extract a topological quantity (the `total quantum dimension' and the 'topological entropy') characterizing the Laughlin states.