The contributions in this volume highlight emergent research in the area of stochastic analysis and mathematical physics, focussing, in particular, on quantum probability. Key topics covered include novel tools for the qualitative analysis of quantum dynamical semigroups (existence of invariant states, subharmonic projections and faithful normal invariant states, propagation of molecular chaos), and new results on quantum information and quantum large deviations. All articles have been thoroughly refereed and are an outgrowth of the International Workshop in Stochastic Analysis and Mathematical Physics held in Santiago, Chile, in January 2000. The book is addressed to an audience of mathematical physicists, as well as specialists in probability theory, stochastic analysis, and operator algebras. Contributors: L. Accardi, A. Chebotarev, F. Cipriano, H. Comman, M. Corgini, F. Fagnola, C. Fernández, J.C. García, A. Gottlieb, S. Kozyrev, K.R. Parthasarathy, H. Prado, R. Quezada, O. Rask, R. Rebolledo.