The Kronig-Penney model is a common starting point for studying the quantum mechanics of
electrons in a confining periodic potential. This model uses a square-well potential; the …

Since their experimental discovery in 1989, the electron-doped cuprate superconductors
have presented both a major challenge and a major opportunity. The major challenge has …

Abstract The Dynamic Hubbard Model (DHM) has been introduced as a framework for the
electron-hole asymmetry observed in materials like high-temperature superconductors. In …

The two-electron configuration in the helium atom is known to very high precision. Yet, we
tend to refer to this configuration as a 1s↑ 1s↓ singlet, where the designations refer to …

Where the doped holes reside in cuprate superconductors has crucial implications for the
understanding of the mechanism responsible for their high-temperature superconductivity. It …

Dynamic Hubbard models are extensions of the conventional Hubbard model that take into
account the fact that atomic orbitals expand upon double occupancy. It is shown here that …

A reformulation of site-occupation embedding theory (SOET) in terms of Green's functions is
presented. Referred to as site-occupation Green's-function embedding theory (SOGET), this …

We discuss how to construct a tight-binding model Hamiltonan for the simplest possible
solid, composed of hydrogen-like atoms. A single orbital per atom is not sufficient because …

The dynamic Hubbard model represents the physics of a multiband Hubbard model by using
a pseudospin degree of freedom to dynamically modify the on-site Coulomb interaction …

The two-site dynamical mean field theory (DMFT) is applied to the dynamic Hubbard model.
This model takes into account a correction to the Coulomb interaction due to particle double …