title: Simulation of quantum many-body systems with strings of operators and Monte Carlo tensor contractions.
abstract: We introduce string-bond states, a class of states obtained by placing strings of operators on a lattice, which encompasses the relevant states in quantum information. For string-bond states, expectation values of local observables can be computed efficiently using Monte Carlo sampling, making them suitable for a variational algorithm which extends the density matrix renormalization group to higher dimensional and irregular systems. Numerical results demonstrate the applicability of these states to the simulation of many-body systems.
authors: Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, D-85748 Garching, Germany.
authors: Norbert
authors: N
authors: Schuch
authors: Michael M
authors: MM
authors: Wolf
authors: Frank
authors: F
authors: Verstraete
authors: J Ignacio
authors: JI
authors: Cirac