Browsing by Subject "Optical lattices"

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  • 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 ...
  • Greschner, Sebastian; Sun, G.; Poletti, D.; Santos, Luis (College Park, MD : American Physical Society, 2014)
    We show that density-dependent synthetic gauge fields may be engineered by combining periodically modulated interactions and Raman-assisted hopping in spin-dependent optical lattices. These fields lead to a density-dependent ...
  • Mishra, Tapan; Greschner, Sebastian; Santos, Luis (Bristol : Institute of Physics Publishing, 2016)
    A density-dependent gauge field may induce density-induced geometric frustration, leading to a non-trivial interplay between density modulation and frustration, which we illustrate for the particular case of ultra-cold ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Heinze, Jannes; Deuretzbacher, Frank; Pfannkuche, Daniela (College Park, MD : American Physical Society, 2010)
    We study the dependency of the quantum spin dynamics on the particle number in a system of ultracold spin-1 atoms within the single-spatial-mode approximation. We find, for all strengths of the spin-dependent interaction, ...
  • Cardarelli, Lorenzo (Hannover : Repositorium der Leibniz Universität Hannover, 2019)
    Gauge theories are ubiquitous in physics. Many intriguing phenomena in condensed matter physics owe to the action of the electromagnetic field, which is an Abelian gauge theory. The numerical treatment of many-body systems ...
  • Greschner, Sebastian; Santos, Luis; Vekua, T. (College Park, MD : American Physical Society, 2013)
    Ultracold bosons in zig-zag optical lattices present a rich physics due to the interplay between frustration induced by lattice geometry, two-body interactions, and a three-body constraint. Unconstrained bosons may develop ...
  • Ghosh, Sudeep Kumar; Greschner, Sebastian; Yadav, Umesh K.; Mishra, Tapan; Rizzi, Matteo; Shenoy, Vijay B. (College Park, MD : American Physical Society, 2017)
    An innovative way to produce quantum Hall ribbons in a cold atomic system is to use M hyperfine states of atoms in a one-dimensional optical lattice to mimic an additional "synthetic dimension." A notable aspect here is ...
  • Gempel, M.W.; Hartmann, T.; Schulze, Torben A.; Voges, K.K.; Zenesini, Alessandro; Ospelkaus, Silke (Bristol : Institute of Physics Publishing, 2016)
    In this paper, we present an electrode geometry for the manipulation of ultracold, rovibrational ground state NaK molecules. The electrode system allows to induce a dipole moment in trapped diatomic NaK molecules with a ...