4 papers
A Unified Approach to Strong Local Correlations and Collective Fluctuations: Eliminating Divergence in the Spin Channel
S. D. Semenov, A. I. Lichtenstein, A. N. Rubtsov
Dynamical mean-field theory (DMFT) provides an optimal local approximation for correlated lattice systems by mapping the lattice onto a self-consistent effective impurity model. To…
Time-dependent fluctuating local field approach for description of the correlated fermions dynamics
L. D. Silakov, Ya. S. Lyakhova, A. N. Rubtsov
We formulate a time-dependent Fluctuating Local Field (TD-FLF) method for correlated fermion dynamics, extending the stationary FLF approach. The wavefunction is approximated as an…
Fluctuating field series: towards calculations of correlated systems with high accuracy
Ya. S. Lyakhova, S. D. Semenov, A. I. Lichtenstein +1
We introduce regular series expansion for weakly- and moderately-correlated fermionic systems, based on Fluctuating Local Field approach. The method relies on the explicit account…
Locality of topological dynamics in Chern insulators
A. A. Markov, D. B. Golovanova, A. R. Yavorsky +1
A system having macroscopic patches in different topological phases have no well-defined global topological invariant. To treat such a case, the quantities labeling different areas…