title: Communication: quantum dynamics in classical spin baths.
abstract: A formalism for studying the dynamics of quantum systems embedded in classical spin baths is introduced. The theory is based on generalized antisymmetric brackets and predicts the presence of open-path off-diagonal geometric phases in the evolution of the density matrix. The weak coupling limit of the equation can be integrated by standard algorithms and provides a non-Markovian approach to the computer simulation of quantum systems in classical spin environments. It is expected that the theory and numerical schemes presented here have a wide applicability.
authors.affiliation: School of Chemistry and Physics, University of KwaZulu-Natal, Pietermaritzburg, Private Bag X01, Scottsville, 3209 Pietermaritzburg, South Africa. sergi@ukzn.ac.za
authors.forename: Alessandro
authors.initials: A
authors.lastname: Sergi