Realizing the Quantum Hall System in String Theory

In a recent paper Bernevig, Brodie, Susskind and Toumbas constructed a brane realization of the Quantum Hall fluid. Since then it has been realized that the Quantum Hall system is very closely related to non--commutative Chern Simons theory and this suggests alternative brane constructions which we believe are more reliable and clear. In this paper a brane construction is given for the non--commutative Chern Simons Matrix formulation of the Quantum Hall system as described by in recent papers by Susskind, Polychronakos and by Hellerman and Van Raamsdonk. The system is a generalized version of Berkooz's ``Rigid Light Cone Membrane which occurs as an excition of the DLCQ description of the M5--brane in a background 3--form field. The original construction of Berkooz corresponds to the fully filled $\nu =1$ state of the QH system. To change the filling fraction to $\nu = 1/(k+1)$ a system of $k$ background D8-branes is required. Quasi--hole excitations can be generated by passing a D6-brane though the Rigid Membrane.