Pairing patterns in one-dimensional spin-and mass-imbalanced Fermi gases

L Rammelmüller, JE Drut, J Braun - SciPost Physics, 2020 - scipost.org
We study spin-and mass-imbalanced mixtures of spin-$\tfrac {1}{2} $ fermions interacting via
an attractive contact potential in one spatial dimension. Specifically, we address the …

Gap scaling at Berezinskii-Kosterlitz-Thouless quantum critical points in one-dimensional Hubbard and Heisenberg models

M Dalmonte, J Carrasquilla, L Taddia, E Ercolessi… - Physical Review B, 2015 - APS
We discuss how to locate critical points in the Berezinskii-Kosterlitz-Thouless (BKT)
universality class by means of gap-scaling analyses. While accurately determining such …

Multimer formation in one-dimensional two-component gases and trimer phase in the asymmetric attractive Hubbard model

G Roux, E Burovski, T Jolicoeur - Physical Review A—Atomic, Molecular, and …, 2011 - APS
We consider two-component one-dimensional quantum gases at special imbalanced
commensurabilities which lead to the formation of multimer (multiparticle bound-states) as …

Mass-imbalanced ionic Hubbard chain

M Sekania, D Baeriswyl, L Jibuti, GI Japaridze - Physical Review B, 2017 - APS
A repulsive Hubbard model with both spin-asymmetric hopping (t↑≠ t↓) and a staggered
potential (of strength Δ) is studied in one dimension. The model is a compound of the mass …

Pairing, crystallization and string correlations of mass-imbalanced atomic mixtures in one-dimensional optical lattices

T Roscilde, CDE Boschi, M Dalmonte - Europhysics Letters, 2012 - iopscience.iop.org
We numerically determine the very rich phase diagram of mass-imbalanced binary mixtures
of hardcore bosons (or equivalently—fermions, or hardcore Bose/Fermi mixtures) loaded in …

Interplay between exotic superfluidity and magnetism in a chain of four-component ultracold atoms

E Szirmai, G Barcza, J Sólyom, Ö Legeza - Physical Review A, 2017 - APS
We investigate the spin-polarized chain of ultracold alkaline-earth-metal atoms with spin-3/2
described by the fermionic Hubbard model with SU (4) symmetric attractive interaction. The …

Entanglement entropies in one-dimensional systems

L Taddia - arXiv preprint arXiv:1309.4003, 2013 - arxiv.org
Entanglement entropies have revealed, in the last years, to be a powerful tool to extract
information about the physics of condensed-matter systems. In the first part of this thesis, we …

Effective Hamiltonian for a half-filled asymmetric ionic Hubbard chain with alternating on-site interaction

I Grusha, M Menteshashvili… - International Journal of …, 2016 - World Scientific
We derive an effective spin Hamiltonian for the one-dimensional half-filled asymmetric ionic
Hubbard model (IHM) with alternating on-site interaction in the limit of strong repulsion. It is …

Low-energy doublons in the ac-driven two-species Hubbard model

S Longhi, G Della Valle - Physical Review A—Atomic, Molecular, and Optical …, 2013 - APS
The hopping dynamics of two fermionic species with different effective masses in the one-
dimensional Hubbard model driven by an external field are theoretically investigated. A …

Compressibility and entropy of cold fermions in one-dimensional optical lattices

A Snyder, I Tanabe, T De Silva - Physical Review A—Atomic, Molecular, and …, 2011 - APS
We calculate several thermodynamic quantities for repulsively interacting one-dimensional
fermions. We solve the Hubbard model at both zero and finite temperatures using the Bethe …