Auflistung nach Schlagwort "Hubbard model"

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  • Anyon Hubbard Model in One-Dimensional Optical Lattices 
    Greschner, Sebastian; Santos, Luis (College Park, MD : American Physical Society, 2015)
    Raman-assisted hopping may be used to realize the anyon Hubbard model in one-dimensional optical lattices. We propose a feasible scenario that significantly improves the proposal of T. Keilmann et al. [Nat. Commun. 2, 361 ...
  • Correlation functions of the one-dimensional Hubbard model in a magnetic field 
    Frahm, Holger; Korepin, V.E. (College Park (Maryland) : American Physical Society, 1991)
    We present a general method for the calculation of correlation functions in the repulsive one-dimensional Hubbard model at less than half-filling in a magnetic field h. We describe the dependence of the critical exponents ...
  • Critical exponents for the one-dimensional Hubbard model 
    Frahm, Holger; Korepin, V.E. (College Park (Maryland) : American Physical Society, 1990)
    Using results on the scaling of energies with the size of the system and the principles of conformal quantum field theory, we calculate the asymptotics of correlation functions for the one-dimensional Hubbard model in the ...
  • Density correlations in the half-filled Hubbard model 
    Eßler, F.H.L.; Frahm, Holger (College Park (Maryland) : American Physical Society, 1999)
    We consider density-density correlations in the one-dimensional Hubbard model at half filling. On intuitive grounds one might expect them to exhibit an exponential decay. However, as has been noted recently, this is not ...
  • Disorder and superconductivity in doped semiconductor nanotubes 
    Shirakawa, T.; Nishimoto, S.; Ohta, Y.; Fukuyama, H. (Bristol : IOP Publishing Ltd., 2009)
    Finite-size systems of the one-dimensional attractive Hubbard model with random potential are studied as an effective model for doped semiconductor nanotubes. We calculate the binding energy of Cooper pairs and pair ...
  • Dissipative preparation of antiferromagnetic order in the Fermi-Hubbard model 
    Kaczmarczyk, J.; Weimer, Hendrik; Lemeshko, Mikhail (Bristol : Institute of Physics Publishing, 2016)
    The Fermi-Hubbard model is one of the key models of condensed matter physics, which holds a potential for explaining the mystery of high-temperature superconductivity. Recent progress in ultracold atoms in optical lattices ...
  • Dynamics of ion Coulomb crystals 
    Timm, Lars (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    The field of quantum simulations has achieved a remarkable success through the development of highly controllable and accessible quantum platforms, which pro- vide insights into the microscopic properties of complex ...
  • Engineering interactions and anyon statistics by multicolor lattice-depth modulations 
    Cardarelli, Lorenzo; Greschner, Sebastian; Santos, Luis (College Park, MD : American Physical Society, 2016)
    We show that a multicolor modulation of the depth of an optical lattice allows for a flexible independent control of correlated hopping, occupation-dependent gauge fields, effective on-site interactions without Feshbach ...
  • Exploring unconventional hubbard models with doubly modulated lattice gases 
    Greschner, Sebastian; Santos, Luis; Poletti, D. (College Park, MD : American Physical Society, 2014)
    Recent experiments show that periodic modulations of cold atoms in optical lattices may be used to engineer and explore interesting models. We show that double modulation combining lattice shaking and modulated interactions ...
  • Nonquasiparticle states in the half-metallic ferromagnet simulated by the two-band Hubbard model 
    Nakano, K.; Shirakawa, T.; Ohta, Y. (Bristol : IOP Publishing Ltd., 2010)
    The density-matrix renormalization group method is used to study the three-band zigzag ladder model that simulates the electronic state of the t 2g-orbital system of the double string of the edge-shared CrO 6 octahedra in ...
  • SO(5)-Symmetrie in elektronischen Leiterstrukturen : exakte Lösungen, Phasendiagramme und Korrelationen 
    Stahlsmeier, Martin (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2002)
    [no abstract]
  • X-ray edge singularity in integrable lattice models of correlated electrons 
    Eßler, F.H.L.; Frahm, Holger (College Park (Maryland) : American Physical Society, 1997)
    We study the singularities in x-ray absorption spectra of one-dimensional Hubbard and t-J models. We use boundary conformal field theory and the Bethe ansatz solutions of these models with both periodic and open boundary ...