Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-06-06
EPL 81 No 1 (January 2008) 10005
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 3 figures, V2: changes in the presentation
Scientific paper
10.1209/0295-5075/81/10005
We study Chern numbers to characterize the ground state of strongly interacting systems on a lattice. This method allows us to perform a numerical characterization of bosonic fractional quantum Hall (FQH) states on a lattice where conventional overlap calculation with known continuum case such as Laughlin state, breaks down due to the lattice structure or dipole-dipole interaction. The non-vanishing Chern number indicates the existence of a topological order in the degenerate ground state manifold.
Demler Eugene
Hafezi Mohammad
Lukin Mikhail D.
Sorensen Anders Sondberg
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