Quantum Integrability of 1D Ionic Hubbard Model
Sign Up to like & getrecommendations! Published in 2020 at "Annalen der Physik"
DOI: 10.1002/andp.201900601
Abstract: The quantum integrability of the 1D ionic Hubbard model (IHM) is established using two independent numerical methods, namely i) energy level spacing statistics and ii) occupation profile of one‐particle density matrix (OPDM) eigen‐values. Both methods… read more here.
Keywords: integrability ionic; ionic hubbard; hubbard model; quantum integrability ... See more keywords
Various Charge-Ordered States in the Extended Hubbard Model with On-Site Attraction in the Zero-Bandwidth Limit
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Superconductivity and Novel Magnetism"
DOI: 10.1007/s10948-016-3828-0
Abstract: The extended Hubbard model in the zero-bandwidth limit with intersite density–density interactions (nearest- and next-nearest-neighbor) is analyzed in the site-dependent mean-field approximation. In this paper, we investigate a case of on-site attraction U read more here.
Keywords: bandwidth limit; hubbard model; zero bandwidth; site attraction ... See more keywords
Waterlike anomalies in the Bose–Hubbard model
Sign Up to like & getrecommendations! Published in 2019 at "Physica A: Statistical Mechanics and its Applications"
DOI: 10.1016/j.physa.2018.12.003
Abstract: Although well-researched as a prototype Hamiltonian for strongly interacting quantum systems, the Bose-Hubbard model has not so far been explored as a fluid system with waterlike anomalies. In this work we show that this model… read more here.
Keywords: anomalies bose; hubbard model; waterlike anomalies; bose hubbard ... See more keywords
Flat-band ferromagnetism of SU(N) Hubbard model on Tasaki lattices
Sign Up to like & getrecommendations! Published in 2019 at "Science Bulletin"
DOI: 10.1016/j.scib.2019.08.013
Abstract: We investigate the para-ferro transition of the repulsive SU($N$) Hubbard model on one- and two-dimensional Tasaki lattices. Under certain restrictions for constructing localized many-particle ground states of flat-band ferromagnetism, the quantum strongly correlated electrons model… read more here.
Keywords: hubbard model; band ferromagnetism; flat band; tasaki ... See more keywords
Pair-density-wave in the strong coupling limit of the Holstein-Hubbard model
Sign Up to like & getrecommendations! Published in 2022 at "npj Quantum Materials"
DOI: 10.1038/s41535-022-00426-w
Abstract: A pair-density-wave (PDW) is a superconducting state with an oscillating order parameter. A microscopic mechanism that can give rise to it has been long sought but has not yet been established by any controlled calculation.… read more here.
Keywords: density; hubbard model; density wave; pair density ... See more keywords
Competing magnetic orders in a bilayer Hubbard model with ultracold atoms
Sign Up to like & getrecommendations! Published in 2021 at "Nature"
DOI: 10.1038/s41586-020-03058-x
Abstract: Fermionic atoms in optical lattices have served as a useful model system in which to study and emulate the physics of strongly correlated matter. Driven by the advances of high-resolution microscopy, the current research focus… read more here.
Keywords: hubbard model; two dimensional; magnetic orders; model ... See more keywords
Mechanism of superconductivity in the Hubbard model at intermediate interaction strength
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2205048119
Abstract: Significance We investigate the pairing glue of superconductivity in the two-dimensional Hubbard model, for interaction values relevant to cuprate physics, within a nonperturbative and unbiased approach. In a generalized fluctuation diagnostics scheme applied to the… read more here.
Keywords: superconductivity; interaction; hubbard model; mechanism ... See more keywords
Absence of superconductivity in the repulsive Hubbard model on a square lattice in the regime of strong coupling
Sign Up to like & getrecommendations! Published in 2021 at "Physica Scripta"
DOI: 10.1088/1402-4896/ac03e2
Abstract: The possibility of the superconducting transition in the repulsive Hubbard model on a square lattice is studied using the ladder approximation of the strong coupling diagram technique. The t–U and t–t′–t″–U models are considered in… read more here.
Keywords: hubbard model; strong coupling; model square; repulsive hubbard ... See more keywords
Quantum quench in the infinitely repulsive Hubbard model: the stationary state
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Statistical Mechanics: Theory and Experiment"
DOI: 10.1088/1742-5468/aa8c2c
Abstract: We use the Quench Action approach to study the non-equilibrium dynamics after a quantum quench in the Hubbard model in the limit of infinite interaction. We identify a variety of low-entangled initial states for which… read more here.
Keywords: hubbard model; initial states; model; stationary state ... See more keywords
Boltzmann relaxation dynamics in the strongly interacting Fermi-Hubbard model
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review A"
DOI: 10.1103/physreva.100.053617
Abstract: Via the hierarchy of correlations, we study the Mott insulator phase of the Fermi-Hubbard model in the limit of strong interactions and derive a quantum Boltzmann equation describing its relaxation dynamics. In stark contrast to… read more here.
Keywords: hubbard model; relaxation; relaxation dynamics; fermi hubbard ... See more keywords
Topological phases in the Fermi-Hofstadter-Hubbard model on hybrid-space ladders
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review A"
DOI: 10.1103/physreva.102.023315
Abstract: In recent experiments with ultracold atoms, both two-dimensional (2d) Chern insulators and one-dimensional (1d) topological charge pumps have been realized. Without interactions, both systems can be described by the same Hamiltonian, when some variables are… read more here.
Keywords: hubbard model; hofstadter hubbard; model hybrid; model ... See more keywords