Browsing by Subject "systems"

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  • Schulte, T.; Drenkelforth, S.; Kruse, J.; Tiemeyer, R.; Sacha, K.; Zakrzewski, J.; Lewenstein, M.; Ertmer, Wolfgang; Arlt, Jan J. (Bristol : IOP Publishing Ltd., 2006)
    Disorder plays a crucial role in many systems particularly in solid state physics. However, the disorder in a particular system cannot usually be chosen or controlled. We show that the unique control available for ultracold ...
  • Kern, Albert; Martignoli, Stefan; Mathis, Wolfgang; Steeb, Willi-Hans; Stoop, Ralph Lukas; Stoop, Ruedi (Basel : Mdpi Ag, 2011-06)
    The "Sonar Hopf" cochlea is a recently much advertised engineering design of an auditory sensor. We analyze this approach based on a recent description by its inventors Hamilton, Tapson, Rapson, Jin, and van Schaik, in ...
  • Rapp, Akos; Schmitteckert, Peter; Takacs, Gabor; Zarand, Gergely (Bristol : IOP Publishing Ltd., 2013-01-28)
    We determine numerically the single-particle and the two-particle spectrum of the three-state quantum Potts model on a lattice by using the density matrix renormalization group method, and extract information on the ...
  • Brell, Courtney G. (Bristol : IOP Publishing Ltd., 2015-02-10)
    We define generalized cluster states based on finite group algebras in analogy to the generalization of the toric code to the Kitaev quantum double models. We do this by showing a general correspondence between systems ...
  • Jacob, A.; Ohberg, P.; Juzeliunas, G.; Santos, Luis (Bristol : IOP Publishing Ltd., 2008)
    The Landau levels of cold atomic gases in non-Abelian gauge fields are analyzed. In particular we identify effects on the energy spectrum and density distribution which are purely due to the non-Abelian character of the ...
  • Fedoruk, Sergey; Ivanov, Evgeny; Lechtenfeld, Olaf (New York, NY : Springer International Publishing, 2010)
    We elaborate on a novel superconformal mechanics model possessing D(2, 1; alpha) symmetry and involving extra U(2) spin variables. It is the one-particle case of the N=4 superconformal matrix model recently proposed in ...
  • Brell, Courtney G.; Bartlett, Stephen D.; Doherty, Andrew C. (Bristol : IOP Publishing Ltd., 2014-12-22)
    We construct parent Hamiltonians involving only local 2-body interactions for a broad class of projected entangled pair states (PEPS). Making use of perturbation gadget techniques, we define a perturbative Hamiltonian ...
  • Langer, Thomas; Baringhaus, Jens; Pfnür, Herbert; Schumacher, H.W.; Tegenkamp, Christoph (Bristol : IOP Publishing Ltd., 2010)
    The sheet plasmon in epitaxially grown graphene layers on SiC(0001) and the influence of surface roughness have been investigated in detail by means of low-energy electron diffraction (LEED) and electron energy loss ...
  • Fubini, Andrea; Falci, Giuseppe; Osterloh, Andreas (Bristol : IOP Publishing Ltd., 2007)
    We analyse the crossing of a quantum critical point based on exact results for the transverse XY model. In dependence of the change rate of the driving field, the evolution of the ground state is studied while the transverse ...
  • Barke, Simon; Wang, Y.; Delgado, Juan Jose Esteban; Troebs, Michael; Heinzel, Gerhard; Danzmann, Karsten (Bristol : IOP Publishing Ltd., 2015-05-07)
    The most promising concept for low frequency (millihertz to hertz) gravitational wave observatories are laser interferometric detectors in space. It is usually assumed that the noise floor for such a detector is dominated ...
  • Grabinski, Andre M.; Frahm, Holger (Bristol : IOP Publishing Ltd., 2013-04-17)
    We study a one-dimensional lattice model of interacting spinless fermions. This model is integrable for both periodic and open boundary conditions; the latter case includes the presence of Grassmann valued non-diagonal ...
  • Eckert, K.; Zawitkowski, L.; Leskinen, M. J.; Sanpera, A.; Lewenstein, M. (Bristol : IOP Publishing Ltd., 2007)
    We investigate magnetic properties of Mott-insulating phases of ultracold Bose and Fermi spinor gases in optical lattices. We consider in particular the F = 2 Bose gas, and the F = 3/2 and 5/2 Fermi gases. We derive effective ...