Self-Consistent Effective Hamiltonian Theory for Fermionic Many Body Systems
Strongly Correlated Electrons
2019-10-29 v1 Materials Science
Quantum Physics
Abstract
Using a separable many-body variational wavefunction, we formulate a self-consistent effective Hamiltonian theory for fermionic many-body system. The theory is applied to the two-dimensional Hubbard model as an example to demonstrate its capability and computational effectiveness. Most remarkably for the Hubbard model in 2-d, a highly unconventional quadruple-fermion non-Cooper-pair order parameter is discovered.
Cite
@article{arxiv.1910.12136,
title = {Self-Consistent Effective Hamiltonian Theory for Fermionic Many Body Systems},
author = {Xindong Wang and Hai-Ping Cheng},
journal= {arXiv preprint arXiv:1910.12136},
year = {2019}
}