Physics – Condensed Matter
Scientific paper
1996-05-06
Physics
Condensed Matter
11 pages Tex, 2 figures from request
Scientific paper
10.1016/S0375-9601(96)00830-4
We analyze the action of the inhomogeneous modular group $\Gamma (2)$ on the three cusps of its principal fundamental domain in the Poincare half plane. From this, we obtain an exhaustive classification of the fractional quantum Hall numbers. This classification is somehow similar to the one given by Jain. We also present some resulting remarks concerning direct phase transitions between the different quantum Hall states.
Georgelin Yvon
Wallet Jean-Christophe
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