6533b86efe1ef96bd12cb5ff
RESEARCH PRODUCT
Deciding the fate of the false Mott transition in two dimensions by exact quantum Monte Carlo methods
N. BlümerD. Rostsubject
PhysicsHistoryHubbard modelStrongly Correlated Electrons (cond-mat.str-el)Quantum Monte CarloComputationExtrapolationFOS: Physical sciencesComputer Science ApplicationsEducationMott transitionCondensed Matter - Strongly Correlated ElectronsMultigrid methodThermodynamic limitCondensed Matter::Strongly Correlated ElectronsStatistical physicsQuantumdescription
We present an algorithm for the computation of unbiased Green functions and self-energies for quantum lattice models, free from systematic errors and valid in the thermodynamic limit. The method combines direct lattice simulations using the Blankenbecler Scalapino-Sugar quantum Monte Carlo (BSS-QMC) approach with controlled multigrid extrapolation techniques. We show that the half-filled Hubbard model is insulating at low temperatures even in the weak-coupling regime; the previously claimed Mott transition at intermediate coupling does not exist.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-04-20 |