How isolated quantum systems reach thermal equilibrium is a long-standing question of continuing interest. The absence of equilibration in some systems is also well known, notably Anderson localization in noninteracting systems with quenched disorder. More recently, the term many-body localization has been applied to interacting systems in which equilibration is suppressed by disorder. ...
Out of equilibrium phenomena in the Bose-Hubbard model (BHM), such as the spreading of correlations, thermalization and many-body localization have attracted considerable interest in recent years. We have developed a two particle irreducible (2PI) strong coupling (2PISC) approach that allows us to access out of equilibrium phenomena in dimensions higher than one. We have investigated the...
We generalize the Momentum Average (MA) approximation to compute the finite temperature spectral functions of the Holstein polaron in an one-dimensional system. We validate our MA results in 1D against available numerical data from the density matrix renormalization group (DMRG) method and the finite-temperature Lanczos method, establishing the accuracy of the MA results which are obtained at...
A new quantum framework reveals how chemistry and crystal structure govern high-temperature superconductivity, explaining behaviors seen in multilayer cuprates and guiding the search for room-temperature superconductors.
While low-temperature superconductivity is well understood, the mechanisms behind superconductivity at higher temperature remain elusive. In this work, we propose a quantum...
