title: Efficient evaluation of partition functions of inhomogeneous many-body spin systems.
abstract: We present a numerical method to evaluate partition functions and associated correlation functions of inhomogeneous 2D classical spin systems and 1D quantum spin systems. The method is scalable and has a controlled error. We illustrate the algorithm by calculating the finite-temperature properties of bosonic particles in 1D optical lattices, as realized in current experiments.
authors.affiliation: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, Garching, D-85748, Germany.
authors.forename: V
authors.initials: V
authors.lastname: Murg
authors.forename: F
authors.initials: F
authors.lastname: Verstraete
authors.forename: J I
authors.initials: JI
authors.lastname: Cirac