MATRIX σ-MODELS FOR MULTI D-BRANE DYNAMICS
MATRIX σ-MODELS FOR MULTI D-BRANE DYNAMICS
We describe a dynamical worldsheet origin for the Lagrangian describing the low-energy dynamics of a system of parallel D-branes. We show how matrix-valued collective coordinate fields for the D-branes naturally arise as couplings of a worldsheet sigma-model, and that the quantum dynamics require that these couplings be mutually noncommutative. We …