Annalen der Physik

Cover image for Vol. 524 Issue 8

August 2012

Volume 524, Issue 8

Pages A110–A116, 117–478

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Call for Paper
    5. Contents
    6. Advisory Board
    7. Retrospect
    8. New Features
    9. Physics Forum
    10. Review Article
    11. Original Papers
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      Cover Picture: Ann. Phys. 8/2012

      Article first published online: 13 AUG 2012 | DOI: 10.1002/andp.201290010

      Thumbnail image of graphical abstract

      Spotlight on Protein Folding: Proteins (green), chains of amino acids, are the nano-machines of life; some, for example, transport oxygen (red). Remarkably, based on their amino acid sequences, many proteins can spontaneously fold into unique 3D conformations necessary for function. Despite its complexity, the folding process is subject to simple general limits. Picture: M. M. Lin and A. H. Zewail, pp. 379–391, in this issue.

  2. Issue Information

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Call for Paper
    5. Contents
    6. Advisory Board
    7. Retrospect
    8. New Features
    9. Physics Forum
    10. Review Article
    11. Original Papers
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      Issue Information: Ann. Phys. 8/2012

      Article first published online: 13 AUG 2012 | DOI: 10.1002/andp.201290011

  3. Call for Paper

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Call for Paper
    5. Contents
    6. Advisory Board
    7. Retrospect
    8. New Features
    9. Physics Forum
    10. Review Article
    11. Original Papers
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      Call for Paper: Ann. Phys. 8/2012

      Article first published online: 13 AUG 2012 | DOI: 10.1002/andp.201290012

  4. Contents

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Call for Paper
    5. Contents
    6. Advisory Board
    7. Retrospect
    8. New Features
    9. Physics Forum
    10. Review Article
    11. Original Papers
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      Contents: Ann. Phys. 8/2012 (pages A110–A113)

      Article first published online: 13 AUG 2012 | DOI: 10.1002/andp.201200732

  5. Advisory Board

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Call for Paper
    5. Contents
    6. Advisory Board
    7. Retrospect
    8. New Features
    9. Physics Forum
    10. Review Article
    11. Original Papers
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      The AdP Advisory Board (page A114)

      Article first published online: 13 AUG 2012 | DOI: 10.1002/andp.201200733

  6. Retrospect

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Call for Paper
    5. Contents
    6. Advisory Board
    7. Retrospect
    8. New Features
    9. Physics Forum
    10. Review Article
    11. Original Papers
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  7. New Features

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Call for Paper
    5. Contents
    6. Advisory Board
    7. Retrospect
    8. New Features
    9. Physics Forum
    10. Review Article
    11. Original Papers
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      What's New (page A116)

      Article first published online: 13 AUG 2012 | DOI: 10.1002/andp.201200735

  8. Physics Forum

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Call for Paper
    5. Contents
    6. Advisory Board
    7. Retrospect
    8. New Features
    9. Physics Forum
    10. Review Article
    11. Original Papers
    1. Then & Now

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    2. Expert Opinion

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  9. Review Article

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Call for Paper
    5. Contents
    6. Advisory Board
    7. Retrospect
    8. New Features
    9. Physics Forum
    10. Review Article
    11. Original Papers
    1. Einstein Lecture

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      Protein folding – simplicity in complexity (pages 379–391)

      M.M. Lin and A.H. Zewail

      Article first published online: 23 JUL 2012 | DOI: 10.1002/andp.201200501

      Thumbnail image of graphical abstract

      Understanding and predicting protein folding would elucidate how misfolded proteins cause aggregation and amyloid formation, for example in Alzheimer's disease. Despite the seemingly bewildering complexity of protein biology, simple analytic models can still capture the basic physics and predict the fundamental limits for protein domain size and folding speed.

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      Event-by-event simulation of quantum phenomena (pages 393–410)

      H. De Raedt and K. Michielsen

      Article first published online: 23 JUL 2012 | DOI: 10.1002/andp.201100299

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      A discrete-event simulation approach is reviewed that does not require the knowledge of the solution of the wave equation of the whole system, yet reproduces the statistical distributions of wave theory by generating detection events one-by-one. The simulation approach is illustrated by applications to a two-beam interference experiment and two Bell test experiments, an Einstein-Podolsky-Rosen-Bohm experiment with single photons employing post-selection for pair identification and a single-neutron Bell test interferometry experiment with nearly 100 % detection efficiency.

  10. Original Papers

    1. Top of page
    2. Cover Picture
    3. Issue Information
    4. Call for Paper
    5. Contents
    6. Advisory Board
    7. Retrospect
    8. New Features
    9. Physics Forum
    10. Review Article
    11. Original Papers
    1. You have free access to this content
      Magnetic transitions in strong coupling expansions for nearly degenerate states (pages 411–420)

      R. Frésard, Ch. Hackenberger and T. Kopp

      Article first published online: 22 MAY 2012 | DOI: 10.1002/andp.201200031

      Thumbnail image of graphical abstract

      A strong coupling expansion for a two-band Hubbard model on two sites with nearly degenerate states is considered. A comparative analysis is performed for different schemes of perturbation theory which are applicable to systems with nearly degenerate states.

    2. The t-U-V-J model in cuprates: Strengths of the interactions (pages 421–428)

      Z.G. Koinov

      Article first published online: 18 JUN 2012 | DOI: 10.1002/andp.201200007

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      The t-U-V-J model fits together three major parts of the superconductivity puzzle of the cuprite compounds: (i) the opening of a d-wave pairing gap, (ii) consistency with the fact that the basic pairing mechanism arises from the antiferromagnetic exchange correlations, and (iii) inclusion of charge fluctuations associated with double occupancy of a site.

    3. Coherent phonon generation and detection in ultrathin SrTiO3 grown directly on silicon (pages 429–433)

      C. Cen, M.P. Warusawithana and J. Levy

      Article first published online: 18 JUN 2012 | DOI: 10.1002/andp.201200026

      Thumbnail image of graphical abstract

      Time-resolved two color pump-probe polarization spectroscopy was performed at room temperature on SrTiO3 films grown directly on Si with film thickness varying from 2 nm to 7.8 nm. An E-symmetry mode with a characteristic frequency of 0.2 THz is impulsively generated and measured in these coherently strained tetragonal phase SrTiO3 thin films. A superimposed exponentially decaying signal observed indicates the possible relaxational hopping of Ti ion between double potential wells. The dependence of the coherent phonon signal on pump and probe laser polarization helps to identify the symmetry of the phonon modes.

    4. Obtaining gauge invariant actions via symplectic embedding formalism (pages 434–455)

      E.M.C. Abreu, J. Ananias Neto, A.C.R. Mendes, C. Neves and W. Oliveira

      Article first published online: 18 JUN 2012 | DOI: 10.1002/andp.201100199

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      It is the objective of this work to show a path of obtaining gauge invariant theories from non-invariant ones. Both are named also as first- and second-class theories respectively, obeying Dirac's formalism. It is important to understand why it is always desirable to have a bridge between gauge invariant and non-invariant theories.

    5. Metric-free definition of the energy momentum tensor: Gravitation with symmetric connection (pages 456–460)

      E. Matagne

      Article first published online: 18 JUN 2012 | DOI: 10.1002/andp.201100172

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      A metric-free definition of the energy momentum tensor is presented. That definition can be used with any Lagrangian based gravitational theory where the independent variable is a symmetric connection. The case of Hilbert-Einstein gravitation is treated as an example of such a theory.

    6. Conformal transformations in metric-affine gravity and ghosts (pages 461–469)

      C.N. Karahan, O. Dogangün and D.A. Demir

      Article first published online: 22 MAY 2012 | DOI: 10.1002/andp.201200003

      Thumbnail image of graphical abstract

      Conformal transformations play a widespread role in gravity theories in regard to their cosmological and other implications. In the pure metric theory of gravity, conformal transformations change the frame to a new one wherein one obtains a conformal-invariant scalar-tensor theory such that the scalar field, deriving from the conformal factor, is a ghost.

    7. Universality in heat conduction theory: weakly nonlocal thermodynamics (pages 470–478)

      P. Ván and T. Fülöp

      Article first published online: 23 JUL 2012 | DOI: 10.1002/andp.201200042

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      A linear irreversible thermodynamic framework of heat conduction in rigid conductors is introduced. The deviation from local equilibrium is characterized by a single internal variable and a current multiplier. A general constitutive evolution equation of the current density of the internal energy is derived by introducing linear relationship between the thermodynamic forces and fluxes.

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