We systematically examine how long-range hopping and its synergy with extended
interactions leads to light bound pairs. Pair properties are determined for a dilute extended …

We present a density-matrix embedding theory (DMET) study of the one-dimensional
Hubbard–Holstein model, which is paradigmatic for the interplay of electron–electron and …

We use the density matrix renormalization group method to study a one-dimensional chain
with Peierls electron-phonon coupling, which describes the modulation of the electron …

Employing a largely unbiased variational exact diagonalization technique, we analyze the
consequences of longer-ranged electron hopping and electron-phonon interaction on …

We predict the existence of a pair-liquid phase in lattice fermion systems with finite-range
attractive interactions. This exotic state competes on one side with a normal Fermi liquid of …

We develop a variational Monte Carlo (VMC) method for electron-phonon coupled systems.
The VMC method has been extensively used for investigating strongly correlated electrons …

In this paper, we examine how next-nearest neighbor hopping and interaction affect pair
properties, concluding that small and light (superlight) pairs are ubiquitous in dilute …

Two-particle lattice states are important for physics of magnetism, superconducting oxides,
and cold quantum gases. The quantum-mechanical lattice problem is exactly solvable for …

The interaction of the doped holes with lattice vibrations in an antiferromagnetic (AF)
background is studied using the t− J-Holstein model on an 8-site cluster with 2-holes by an …

A model that combines the extended Hubbard model involving intra-atomic and interatomic
Coulomb repulsion and the Holstein model describing the interaction of a band electron with …