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37 papers · 1 filter
Two-dimensional Mott-Hubbard electrons in an artificial honeycomb lattice
A. Singha, M. Gibertini, B. Karmakar +8
Electrons in artificial lattices enable explorations of the impact of repulsive Coulomb interactions in a tunable system. We have trapped two-dimensional electrons belonging to a g…
Spectral properties of the three-dimensional Hubbard model
Sebastian Fuchs, Emanuel Gull, Matthias Troyer +2
We present momentum resolved single-particle spectra for the three-dimensional Hubbard model for the paramagnetic and antiferromagnetically ordered phase obtained within the dynami…
Continuous-time Monte Carlo methods for quantum impurity models
Emanuel Gull, Andrew J. Millis, Alexander I. Lichtenstein +3
Quantum impurity models describe an atom or molecule embedded in a host material with which it can exchange electrons. They are basic to nanoscience as representations of quantum d…
Sub-matrix updates for the Continuous-Time Auxiliary Field algorithm
Emanuel Gull, Peter Staar, Sebastian Fuchs +5
We present a sub-matrix update algorithm for the continuous-time auxiliary field method that allows the simulation of large lattice and impurity problems. The algorithm takes optim…
Dynamical Mean-Field Theory for Quantum Chemistry
Nan Lin, C. A. Marianetti, Andrew J. Millis +1
The dynamical mean-field concept of approximating an unsolvable many-body problem in terms of the solution of an auxiliary quantum impurity problem, introduced to study bulk materi…
Role of oxygen-oxygen hopping in the three-band copper-oxide model: quasiparticle weight, metal insulator and magnetic phase boundaries, gap values and optical conductivity
Xin Wang, Luca de' Medici, Andrew J. Millis
We investigate the effect of oxygen-oxygen hopping on the three-band copper-oxide model relevant to high- cuprates, finding that the physics is changed only slightly as the ox…