Now showing items 1-9 of 9

    • Co doping induced structural and optical properties of sol-gel prepared ZnO thin films 

      Gungor, E.; Gungor, T.; Caliskan, D.; Ceylan, A.; Ozbay, E. (Elsevier BV, 2014-11)
      The preparation conditions for Co doping process into the ZnO structure were studied by the ultrasonic spray pyrolysis technique. Structural and optical properties of the Co:ZnO thin films as a function of Co concentrations ...
    • Effect of disorder on the interacting fermi gases in a one-dimensional optical lattice 

      Xianlong, G.; Polini, M.; Tosi, M. P.; Tanatar, B. (World Scientific Publishing Co., 2008)
      Interacting two-component Fermi gases loaded in a one-dimensional (1D) lattice and subjected to a harmonic trapping potential exhibit interesting compound phases in which fluid regions coexist with local Mott-insulator ...
    • Evolution of the Hofstadter butterfly in a tunable optical lattice 

      Yllmaz, F.; Ünal, F. N.; Oktel, M. O. (American Physical Society, 2015)
      Recent advances in realizing artificial gauge fields on optical lattices promise experimental detection of topologically nontrivial energy spectra. Self-similar fractal energy structures generally known as Hofstadter ...
    • Fractional quantum Hall states in the vicinity of Mott plateaus 

      UmucalIlar, R. O.; Mueller, E. J. (The American Physical Society, 2010)
      We perform variational Monte Carlo calculations to show that bosons in a rotating optical lattice will form analogs of fractional quantum Hall states when the tunneling is sufficiently weak compared to the interactions, ...
    • Hofstadter butterfly evolution in the space of two-dimensional bravais lattices 

      Yllmaz, F.; Oktel, M. Ö. (American Physical Society, 2017)
      The self-similar energy spectrum of a particle in a periodic potential under a magnetic field, known as the Hofstadter butterfly, is determined by the lattice geometry as well as the external field. Recent realizations of ...
    • Pairing and vortex lattices for interacting fermions in optical lattices with a large magnetic field 

      Zhai, H.; Umucalılar, R. O.; Oktel, M. Ö. (The American Physical Society, 2010)
      We study the structure of a pairing order parameter for spin-1/2 fermions with attractive interactions in a square lattice under a uniform magnetic field. Because the magnetic translation symmetry gives a unique degeneracy ...
    • Quantum correlations of spin-1 atoms in an optical lattice 

      Öztop, B.; Oktel, M. Ö.; Müstecaplioǧlu, Ö. E. (Institute of Physics Publishing, 2009)
      In this work, we investigate the system of cold spin-1 atoms in a one dimensional optical lattice in relation with squeezing and entanglement. By using the corresponding Bose-Hubbard Hamiltonian, both superfluid and ...
    • Quantum entanglement of spin-1 bosons with coupled ground states in optical lattices 

      Öztop, B.; Oktel, M. Ö.; Müstecapliolu, Ö. E.; You, L. (IOP Institute of Physics Publishing, 2009)
      We examine particle entanglement, characterized by pseudo-spin squeezing, of spin-1 bosonic atoms with coupled ground states in a one-dimensional optical lattice. Both the superfluid and Mott-insulator phases are investigated ...
    • Raman superradiance and spin lattice of ultracold atoms in optical cavities 

      Safaei, S.; Müstecaplioǧlu, Ö. E.; Tanatar, B. (IOP Institute of Physics Publishing, 2013)
      We investigate the synthesis of a hyperfine spin lattice in an atomic Bose-Einstein condensate, with two hyperfine spin components, inside a one-dimensional high-finesse optical cavity, using off-resonant superradiant Raman ...