In this work we present a model and a method to study integer quantum Hall(IQH) systems. Making use of the Landau levels structure we divide these twodimensional systems into a set of interacting one dimensional gases, one foreach guiding center. We show that the so-called strong field approximation,used by Kallin and Halperin and by MacDonald, is equivalent, in first order, toa forward scattering approximation and analyze the IQH systems within thisapproximation. Using an appropriate variation of the Landau level bosonizationmethod we obtain the dispersion relations for the collective excitations andthe single particle spectral functions. These results evidence a behaviortypical of non-normal strongly correlated systems, including the spin-chargesplitting of the single particle spectral function. We discuss the origin ofthis behavior in the light of the Tomonaga-Luttinger model and the bosonizationof two dimensional electron gases.
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