Annalen der Physik

Cover image for Vol. 19 Issue 3‐5

April 2010

Volume 19, Issue 3-5

Pages 141–367

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Invited Paper
    6. Original Paper
    7. Invited Papers
    8. Contributed Papers
    1. Cover Picture: Ann. Phys. 3–5/2010

      Article first published online: 25 MAR 2010 | DOI: 10.1002/andp.201090002

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Invited Paper
    6. Original Paper
    7. Invited Papers
    8. Contributed Papers
    1. Contents: Ann. Phys. 3–5/2010 (pages 141–146)

      Article first published online: 25 MAR 2010 | DOI: 10.1002/andp.201019003

  3. Editorial

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Invited Paper
    6. Original Paper
    7. Invited Papers
    8. Contributed Papers
    1. Special Topic Issue “Grassmannian Paths to Cosmology” (pages 147–149)

      Guest Editor M.P. Da̧browski, Guest Editor K.A. Meissner and Guest Editor Yu.V. Shtanov

      Article first published online: 1 MAR 2010 | DOI: 10.1002/andp.201010410

  4. Invited Paper

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Invited Paper
    6. Original Paper
    7. Invited Papers
    8. Contributed Papers
    1. From Grassmann to maximal (N = 8) supergravity (pages 150–160)

      H. Nicolai

      Article first published online: 23 FEB 2010 | DOI: 10.1002/andp.201010411

      Thumbnail image of graphical abstract

      No graphical abstract.

  5. Original Paper

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Invited Paper
    6. Original Paper
    7. Invited Papers
    8. Contributed Papers
    1. Grassmann, geometric algebra and cosmology (pages 161–176)

      A.N. Lasenby

      Article first published online: 26 FEB 2010 | DOI: 10.1002/andp.201010412

      Thumbnail image of graphical abstract

      Starting with Grassmann's work, a short review is given of the development of ‘Geometric Algebra’, and the reasons why it is a useful system for describing much of physics. Applications are then discussed in cosmology, including a novel boundary condition for the universe, and efficient ways to encode Bianchi cosmology. Predictions for the Cosmic Microwave Background in such models, and in another area owing much to Grassmann (String Theory), are also discussed.

  6. Invited Papers

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Invited Paper
    6. Original Paper
    7. Invited Papers
    8. Contributed Papers
    1. Dmitrij Volkov, super-Poincaré group and Grassmann variables (pages 177–185)

      A.A. Zheltukhin

      Article first published online: 23 FEB 2010 | DOI: 10.1002/andp.201010413

      A fundamental role of the Hermann Grassmann anticommuting variables both in physics and mathematics is discussed on the example of supersymmetry. The talk describes how the D. Volkov question about possibility of the existence of Nambu-Goldstone fermions, realized by the Grassmannian variables, resulted in the discovery of the super-Poincar\'e group, its spontaneous breaking and gauging.

    2. Deriving spacetime from first principles (pages 186–195)

      J. Ambjørn, J. Jurkiewicz and R. Loll

      Article first published online: 23 FEB 2010 | DOI: 10.1002/andp.201010414

      Thumbnail image of graphical abstract

      Causal Dynamical Triangulation is a back-to-basics approach to nonperturbative, background-independent quantum gravity, which relies on few ingredients and initial assumptions, has few free parameters and – crucially – is amenable to numerical simulations. After putting the approach in context, the authors briefly describe its set-up and highlight some of its major, and sometimes unexpected findings. Prominent among them is the dynamical generation of a classical de Sitter universe from Planckian quantum fluctuations.

    3. A noncommutative Friedman cosmological model (pages 196–201)

      M. Heller

      Article first published online: 23 FEB 2010 | DOI: 10.1002/andp.201010415

      The closed Friedman cosmological model, based on noncommutative geometry, is presented. Two global effects exhibited by the model are discussed. The first effect is the ``generation of matter out of geometry''. Gravitational field equation in this model has the form of the eigenvalue equation for the Einstein operator. It turns out that the eigenvalues of this operator reproduce components of the energy-momentum tensor. The second effect concerns the existence of the initial and final singularities. Because of the strongly probabilistic character of the noncommutative dynamics on the fundamental level, although singularities do exist, they are probabilistically irrelevant.

    4. Varying alpha (pages 202–210)

      J.D. Barrow

      Article first published online: 23 FEB 2010 | DOI: 10.1002/andp.201010416

      Properties of cosmological theories for the variation of the fine structure ‘constant’ are reviewed. Some general features of the cosmological models are highlighted that exist in these theories with reference to recent quasar data that are consistent with time-variation in the fine structure `constant' since a redshift of 3.5.

    5. Can singularities be avoided in quantum cosmology? (pages 211–218)

      C. Kiefer

      Article first published online: 23 FEB 2010 | DOI: 10.1002/andp.201010417

      Many cosmological models based on general relativity contain singularities. In this contribution the question is addressed whether consistent models without singularities can exist in quantum cosmology. The discussion is based on the Wheeler–DeWitt equation of quantum geometrodynamics. The models under consideration are motivated by recent discussions of dark energy. Employing some natural criteria of singularity avoidance in the quantum theory, it is shown that this can indeed happen in these models.

    6. What is the dark energy paradigm? (pages 219–229)

      D. Polarski

      Article first published online: 4 MAR 2010 | DOI: 10.1002/andp.200910418

      The present accelerated expansion of the universe is a major challenge for cosmology. Dark Energy models aim to explain this unconventional expansion. We have at the present time a large variety of models which are conceptually very different. Here some of them are reviewed, especially those based on a modification of the laws of gravity. Future high precision observations probing both the background and the perturbations will significantly reduce the class of viable models.

    7. Testing dark energy with supernovae (pages 230–237)

      M. Kowalski

      Article first published online: 23 FEB 2010 | DOI: 10.1002/andp.201010419

      Thumbnail image of graphical abstract

      The use of Type Ia Supernovae as cosmic standard candles pose still perhaps the most direct way to probe the Cosmic acceleration history. In this contribution the present status of Supernova cosmology is reviewed. The author focuses on current observations and what they can tell us about the properties of Dark Energy, i.e. our (in-)ability to distinguish dark energy models from cosmological constant. In the last part a brief outlook at what to expect from future surveys is given.

    8. Metric-affine f(R)-gravity with torsion: an overview (pages 238–248)

      S. Capozziello and S. Vignolo

      Article first published online: 23 FEB 2010 | DOI: 10.1002/andp.201010420

      Torsion and curvature could play a fundamental role in explaining cosmological dynamics. f(R)-gravity with torsion is an approach aimed to encompass in a comprehensive scheme all the Dark Side of the Universe (Dark Energy and Dark Matter). The field equations in empty space and in presence of perfect fluid matter are discussed taking into account the analogy with the metric-affine formalism. The result is that the extra curvature and torsion degrees of freedom can be dealt under the standard of an effective scalar field of fully geometric origin. The initial value problem for such theories is also discussed.}

  7. Contributed Papers

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Invited Paper
    6. Original Paper
    7. Invited Papers
    8. Contributed Papers
    1. Flavour mixing in an expanding universe (pages 258–262)

      F. Tarantino

      Article first published online: 8 MAR 2010 | DOI: 10.1002/andp.201010423

    2. Stable periodic regime in a scalar field cosmology (pages 268–270)

      A. Toporensky

      Article first published online: 8 MAR 2010 | DOI: 10.1002/andp.201010425

    3. Fourth-order braneworld gravity (pages 271–275)

      A. Balcerzak

      Article first published online: 8 MAR 2010 | DOI: 10.1002/andp.201010426

    4. On the energy conditions in non-compact Kaluza-Klein gravity (pages 276–280)

      S.M.M. Rasouli and S. Jalalzadeh

      Article first published online: 8 MAR 2010 | DOI: 10.1002/andp.201010427

    5. Non-standard loop quantum cosmology (pages 281–284)

      W. Piechocki

      Article first published online: 8 MAR 2010 | DOI: 10.1002/andp.201010428

    6. On the initial condition in quantum cosmology (pages 285–289)

      P. Pedram

      Article first published online: 26 FEB 2010 | DOI: 10.1002/andp.201010429

    7. Bianchi I model of the universe in terms of nonstandard LQC (pages 290–293)

      P. Dzierżak and W. Piechocki

      Article first published online: 8 MAR 2010 | DOI: 10.1002/andp.201010430

    8. Constraining sudden future singularity models (pages 308–311)

      H. Ghodsi and M.A. Hendry

      Article first published online: 4 MAR 2010 | DOI: 10.1002/andp.201010434

    9. Dark energy from quantum fluctuations (pages 312–315)

      B. Broda and M. Szanecki

      Article first published online: 24 FEB 2010 | DOI: 10.1002/andp.201010435

    10. Presently decaying dark energy? (pages 316–319)

      A. Shafieloo, V. Sahni and A.A. Starobinsky

      Article first published online: 4 MAR 2010 | DOI: 10.1002/andp.201010436

    11. Three steps to accelerated expansion (pages 320–323)

      O. Hrycyna and M. Szydłowski

      Article first published online: 8 MAR 2010 | DOI: 10.1002/andp.201010437

    12. Weak lensing forecasts for dark energy, neutrinos and initial conditions (pages 324–327)

      I. Debono, A. Rassat, A. Réfrégier, A. Amara and T.D. Kitching

      Article first published online: 9 MAR 2010 | DOI: 10.1002/andp.201010438

    13. On the fate of vacuum bubbles on matter backgrounds (pages 336–339)

      A. Rakić, D. Simon, J. Adamek and J. Niemeyer

      Article first published online: 4 MAR 2010 | DOI: 10.1002/andp.201010441

    14. Some spaces are more equal than others (pages 340–343)

      B.F. Roukema

      Article first published online: 26 FEB 2010 | DOI: 10.1002/andp.201010442

    15. On the abuse of gravity theories in cosmology (pages 344–346)

      L.M. Sokołowski

      Article first published online: 23 FEB 2010 | DOI: 10.1002/andp.201010443

    16. PPN limit and cosmological gravitational waves as tools to constrain f(R)-gravity (pages 347–350)

      M. De Laurentis, S. Capozziello, S. Nojiri and S.D. Odintsov

      Article first published online: 8 MAR 2010 | DOI: 10.1002/andp.201010444

    17. (Quantum) gravity effects via exotic ℝ4 (pages 355–358)

      J. Król

      Article first published online: 26 FEB 2010 | DOI: 10.1002/andp.201010446

    18. Bose-Einstein condensation in the early universe (pages 364–367)

      M. Morikawa

      Article first published online: 23 FEB 2010 | DOI: 10.1002/andp.201010448

SEARCH

SEARCH BY CITATION