Annalen der Physik

Cover image for Vol. 18 Issue 6

June 2009

Volume 18, Issue 6

Pages 379–462

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Original Papers
    5. 100 years ago
    1. Cover Picture: Ann. Phys. 6/2009

      Article first published online: 10 JUN 2009 | DOI: 10.1002/andp.200990006

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Original Papers
    5. 100 years ago
    1. Contents: Ann. Phys. 6/2009 (pages 379–380)

      Article first published online: 15 JUN 2009 | DOI: 10.1002/andp.200918006

  3. Original Papers

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Original Papers
    5. 100 years ago
    1. The mathematical pendulum from Gauß via Jacobi to Riemann (pages 381–390)

      W. Dittrich

      Article first published online: 19 MAY 2009 | DOI: 10.1002/andp.200910351

      Thumbnail image of graphical abstract

      The goal of this article is to introduce double-periodic elliptic functions on the basis of a “simple” mechanical system, that of the mathematical pendulum. Thereby it is not geometry that is in the foreground, as in Gauß's analysis of the lemniscatian curve, but rather the calculation of the specific attributes of elliptic functions with the aid of a periodic integrable system. Not the spatial degree of freedom, but the time variable is continued into the complex plane. This will make it possible to not only identify the known real period of the pendulum oscillation, but also to detect a second imaginary period. Only then does the solution of the equation of motion become a Jacobi-type elliptic function. …

    2. Nonequilibrium quantum anharmonic oscillator and scalar field: high temperature approximations (pages 391–409)

      R.F. Alvarez-Estrada

      Article first published online: 19 MAY 2009 | DOI: 10.1002/andp.200810355

      The authors treat a relativistic quantum boson gas, described by a scalar quantum field, with quartic self-interaction (ϕ4) in three spatial dimensions: they review the known equilibrium case and present new proposals off-equilibrium. For high temperature and large spatial scales, the behaviour …

    3. Five-dimensional relativity and extended elementary particles (pages 410–435)

      G. Lessner

      Article first published online: 10 JUN 2009 | DOI: 10.1002/andp.200810353

      Thumbnail image of graphical abstract

      Five-dimensional relativity, based on the 5-dimensional vacuum equations Rμν = 0, is interpreted as a general relativistic field theory describing the inner structure of extended elementary particles. The most general spherically symmetric, purely electric and asymptotically flat solution of the field equations is calculated.

    4. Gravitoelectromagnetic cavitons in the kinetic regime (pages 436–453)

      X.Q. Li, S.Q. Liu and X.Y. Tao

      Article first published online: 19 MAY 2009 | DOI: 10.1002/andp.200810352

      Thumbnail image of graphical abstract

      The authors study the interaction of a two-level atom and two fields, one of them classical. They obtain an effective Hamiltonian for this system by using a method recently introduced that produces a small rotation …

    5. Intrinsic decoherence in the interaction of two fields with a two-level atom (pages 454–458)

      R. Juárez-Amaro, J.L. Escudero-Jiménez and H. Moya-Cessa

      Article first published online: 10 JUN 2009 | DOI: 10.1002/andp.200810356

      Thumbnail image of graphical abstract

      The authors study the interaction of a two-level atom and two fields, one of them classical. They obtain an effective Hamiltonian for this system by using a method recently introduced that produces a small rotation …

  4. 100 years ago

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Original Papers
    5. 100 years ago
    1. Annalen der Physik. Band 29 (pages 459–462)

      Article first published online: 10 JUN 2009 | DOI: 10.1002/andp.200990007

      Thumbnail image of graphical abstract

      A closer look into the grand history of Annalen der Physik: themes which ccupied the minds of physicists one century ago

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