Matthias Troyer

TL;DR: In this paper, a novel Simulated Quantum Annealing (SQA) algorithm which employs a multispin quantum fluctuation operator was introduced, at variance with the usual transverse field, short-range two-spin flip interactions are included in the driver Hamiltonian.

TL;DR: In this paper, the effect of thermal fluctuations on the topological stability of chiral p-wave superconductors was studied and it was shown that proliferation of vortex-antivortex pairs above the Kosterlitz-Thouless temperature T_KT drives the transition from a thermal Quantum Hall insulator to a thermal metal/insulator, and dramatically modifies the ground-state degeneracy splitting.

TL;DR: It is demonstrated that the method proposed by Efetov is just a reformulation of the Blankenbeckler, Scalapino, and Sugar approach and thus it contains exactly the same sign problem, including the dependence of the sign on the smoothness of the paths.

TL;DR: In this paper, the authors describe quantum monte carlo simulations of the static and dynamic properties of the one dimensional boson Hubbard model, emphasizing the extent to which an external confining potential modifies the behavior.

TL;DR: The four-site DCA method of including intersite correlations in the dynamical mean field theory is used to investigate the metal-insulator transition in the Hubbard model.