Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2004-07-16
Physica B 359, 648 (2005)
Physics
Condensed Matter
Strongly Correlated Electrons
2 pages, 5 figures, submitted to SCES '04
Scientific paper
10.1016/j.physb.2005.01.179
We present a new method, ePT, for extrapolating few known coefficients of a perturbative expansion. Controlled by comparisons with numerically exact quantum Monte Carlo (QMC) results, 10th order strong-coupling perturbation theory (PT) for the Hubbard model on the Bethe lattice is reliably extrapolated to infinite order. Within dynamical mean-field theory (DMFT), we obtain continuous estimates of energy E and double occupancy D with unprecedented precision O(10^{-5}) for the Mott insulator above its stability edge U_{c1}=4.78 as well as critical exponents. In addition, we derive corresponding precise estimates for E and D in the metallic ground state from extensive low-temperature QMC simulations using a fit to weak-coupling PT while enforcing thermodynamic consistency.
Blümer Nils
Kalinowski Eva
No associations
LandOfFree
Ground state of the frustrated Hubbard model within DMFT: energetics of Mott insulator and metal from ePT and QMC does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Ground state of the frustrated Hubbard model within DMFT: energetics of Mott insulator and metal from ePT and QMC, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ground state of the frustrated Hubbard model within DMFT: energetics of Mott insulator and metal from ePT and QMC will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-636256