ar X iv : c on d - m at / 9 60 40 23 v 1 3 A pr 1 99 6 Excitons of Composite Fermions

ar X iv : c on d - m at / 9 31 20 90 v 1 2 2 D ec 1 99 3 Hund ’ s Rule for Composite Fermions

We consider the " fractional quantum Hall atom " in the vanishing Zeeman energy limit, and investigate the validity of Hund's maximum-spin rule for interacting electrons in various Landau levels. While it is not valid for electrons in the lowest Landau level, there are regions of filling factors where it predicts the ground state spin correctly provided it is applied to composite fermions. The ...

ar X iv : c on d - m at / 9 60 40 14 v 1 2 A pr 1 99 6 Quantum Hall Effect and Chaotic Motion in Phase Space

We discuss the relation between the Quantum Hall behaviour of charged carriers and their chaotic motion in phase space. It is shown that the quantum Hall diagram is comparable with the stepped diagram in phase space of a chaotic motion.

ar X iv : c on d - m at / 9 60 30 23 v 1 4 M ar 1 99 6 Few interacting particles in a random potential

We study the localization length of few interacting particles in a random potential. Concentrating on the case of three particles we show that their localization length is strongly enhanced comparing to the enhancement for two interacting particles.

ar X iv : c on d - m at / 9 60 31 90 v 1 2 9 M ar 1 99 6 The Four - Dimensional XY Spin Glass

ar X iv : c on d - m at / 9 60 30 88 v 1 1 2 M ar 1 99 6 Finite temperature mobility of a particle coupled to a fermion environment

We study numerically the finite temperature and frequency mobility of a particle coupled by a local interaction to a system of spinless fermions in one dimension. We find that when the model is integrable (particle mass equal to the mass of fermions) the static mobility diverges. Further, an enhanced mobility is observed over a finite parameter range away from the integrable point. We present a...