Beyond quantum cluster theories: multiscale approaches for strongly correlated systems

HF Fotso, KM Tam, J Moreno - Quantum Science and …, 2022‏ - iopscience.iop.org
The degrees of freedom that confer to strongly correlated systems their many intriguing
properties also render them fairly intractable through typical perturbative treatments. For this …

Exact diagonalization as an impurity solver in dynamical mean field theory

Y Lu, MW Haverkort - The European Physical Journal Special Topics, 2017‏ - Springer
The dynamical mean-field theory (DMFT) maps a correlated lattice problem onto an impurity
problem of a single correlated site coupled to an uncorrelated bath. Most implementations …

Quantum Embedding for Molecules with Auxiliary Particles-The Ghost Gutzwiller Ansatz

C Mejuto-Zaera - Faraday Discussions, 2024‏ - pubs.rsc.org
Strong/static electronic correlation mediates the emergence of remarkable phases of matter,
and underlies the exceptional reactivity properties in transition metal-based catalysts …

State-of-the-art techniques for calculating spectral functions in models for correlated materials

K Hallberg, DJ García, PS Cornaglia, JI Facio… - Europhysics …, 2015‏ - iopscience.iop.org
The dynamical mean-field theory (DMFT) has become a standard technique for the study of
strongly correlated models and materials overcoming some of the limitations of density …

Quantum embedding for molecules using auxiliary particles--The ghost Gutzwiller Ansatz

C Mejuto-Zaera - arxiv preprint arxiv:2403.05157, 2024‏ - arxiv.org
Strong/static electronic correlation mediates the emergence of remarkable phases of matter,
and underlies the exceptional reactivity properties in transition metal-based catalysts …

Solving the multi-site and multi-orbital dynamical mean field theory using density matrix renormalization

Y Núñez Fernández, K Hallberg - Frontiers in Physics, 2018‏ - frontiersin.org
We implement an efficient numerical method to calculate response functions of complex
impurities based on the Density Matrix Renormalization Group (DMRG) and use it as the …

Density matrix renormalization

K Hallberg - Theoretical Methods for Strongly Correlated Electrons, 2004‏ - Springer
Abstract The Density Matrix Renormalization Group (DMRG) has become a powerful
numerical method that can be applied to low-dimensional strongly correlated fermionic and …

An efficient impurity-solver for the dynamical mean field theory algorithm

Y Núñez Fernández, K Hallberg - Papers in physics, 2017‏ - SciELO Argentina
An efficient impurity-solver for the dynamical mean field theory algorithm Page 1 Papers in
Physics, vol. 9, art. 090005 (2017) Received: 31 March 2017, Accepted: 06 June 2017 Edited …

[PDF][PDF] A Study of the Hubbard Model in Two Dimensions

D Paul‏ - researchgate.net
It is believed that the Hubbard model being one of the simplest models serves the purpose
of over-viewing into how there are interactions between electrons which leads to insulating …

Metal-insulator transition in the hybridized two-orbital Hubbard model revisited

Y Núñez-Fernández, K Hallberg - Journal of Physics: Conference …, 2018‏ - iopscience.iop.org
In this work we study the two-orbital Hubbard model on a square lattice in the presence of
hybridization between nearest-neighbor orbitals and a crystal-field splitting. We use a highly …