Annalen der Physik

Cover image for Vol. 522 Issue 12

December 2010

Volume 522, Issue 12

Pages 859–940

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Original Papers
    1. Cover Picture: Ann. Phys. 12/2010

      Article first published online: 9 NOV 2010 | DOI: 10.1002/andp.201090011

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Original Papers
    1. Contents: Ann. Phys. 12/2010 (pages 859–860)

      Article first published online: 9 NOV 2010 | DOI: 10.1002/andp.201052212

  3. Original Papers

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Original Papers
    1. Implications upon theory discrimination of an accurate measurement of the time rate of change of the gravitational “constant” G and other cosmological parameters (pages 861–873)

      A.J. Sanders, G.T. Gillies and E. Schmutzer

      Article first published online: 18 OCT 2010 | DOI: 10.1002/andp.201010460

      Thumbnail image of graphical abstract

      A substantial improvement in the accuracy of ˙G tests (The dot denotes the time derivative.) would make it realistic to speak in terms of a measurement of ˙G, rather than merely a smaller upper bound on | ˙G|. The authors show that the accuracy Δ | ˙G/G|≈ 10-14 yr-1 may be sufficient to discriminate among different models. …

    2. The homology of defective crystal lattices and the continuum limit (pages 874–903)

      D.H. Delphenich

      Article first published online: 7 OCT 2010 | DOI: 10.1002/andp.201010461

      Thumbnail image of graphical abstract

      The problem of extending fields that are defined on lattices to fields defined on the continua that they become in the continuum limit is basically one of continuous extension from the 0-skeleton of a simplicial complex to its higher-dimensional skeletons. …

    3. Modification of black-body radiance at low temperatures and frequencies (pages 904–911)

      C. Falquez, R. Hofmann and T. Baumbach

      Article first published online: 6 OCT 2010 | DOI: 10.1002/andp.201000073

      Thumbnail image of graphical abstract

      The authors discuss the low-frequency spectrum of the radiance at temperatures ranging between 5 and 20 Kelvin. They conclude that compared to the conventional theory the only observable effect is associated with the spectral gap (total screening) which …

    4. Hubble parameter in QCD Universe for finite bulk viscosity (pages 912–923)

      A. Tawfik, M. Wahba, H. Mansour and T. Harko

      Article first published online: 21 OCT 2010 | DOI: 10.1002/andp.201000103

      Thumbnail image of graphical abstract

      The authors consider the influence of the perturbative bulk viscosity on the evolution of the Hubble parameter in the QCD era of the early Universe. For the geometry of the Universe they assume the homogeneous and isotropic Friedmann-Lemaitre-Robertson-Walker metric, while the background matter is assumed to be characterized by barotropic equations of state, obtained from recent lattice QCD simulations, and heavy-ion collisions, respectively. Taking into account a perturbative form for the bulk viscosity coefficient, they obtain the evolution of the Hubble parameter, and they compare it with its evolution for an ideal (non-viscous) cosmological matter. A numerical solution for the viscous QCD plasma in the framework of the causal Israel-Stewart thermodynamics is also obtained. …

    5. Doubly special relativity in de Sitter spacetime (pages 924–940)

      S. Mignemi

      Article first published online: 26 OCT 2010 | DOI: 10.1002/andp.201000105

      The author discusses the generalization of Doubly Special Relativity to a curved de Sitter background. The model has three fundamental observer-independent scales, the velocity of light c, the de Sitter radius α, and the Planck energy κ, and can be realized through a nonlinear action of the de Sitter group on a noncommutative position space. The author considers different choices of coordinates on the de Sitter hyperboloid that, although equivalent, may be more suitable for treating different problems. …

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