Annalen der Physik

Cover image for Vol. 19 Issue 1‐2

February 2010

Volume 19, Issue 1-2

Pages 1–139

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Original Papers
    6. 100 years ago
    1. Cover Picture: Ann. Phys. 1–2/2010

      Version of Record online: 27 JAN 2010 | DOI: 10.1002/andp.201090000

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Original Papers
    6. 100 years ago
    1. Contents: Ann. Phys. 1–2/2010 (pages 1–4)

      Version of Record online: 27 JAN 2010 | DOI: 10.1002/andp.201019001

  3. Editorial

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Original Papers
    6. 100 years ago
    1. Editorial: Ann. Phys. 1–2/2010 (page 5)

      U. Eckern

      Version of Record online: 27 JAN 2010 | DOI: 10.1002/andp.201019002

  4. Original Papers

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Original Papers
    6. 100 years ago
    1. Pair and impair, even and odd form fields, and electromagnetism (pages 6–34)

      R. da Rocha and W.A. Rodrigues Jr.

      Version of Record online: 16 DEC 2009 | DOI: 10.1002/andp.200910374

      In this paper after reviewing the Schouten and de Rham definition of impair and pair differential form fields (not to be confused with differential form fields of even and odd grades) we prove that in a relativistic spacetime it is possible (despite claims in contrary) to coherently formulate electromagnetism (and we believe any other physical theory) using only pair form fields or, if one wishes, using pair and impair form fields together, in an appropriate way. Those two distinct descriptions involve only a mathematical choice and do not seem to lead to any observable physical consequence if due care is taken.

    2. An electric charge has no screw sense – a comment on the twistfree formulation of electrodynamics by da Rocha and Rodrigues (pages 35–44)

      Y. Itin, Yu.N. Obukhov and F.W. Hehl

      Version of Record online: 4 JAN 2010 | DOI: 10.1002/andp.200910408

      Da Rocha and Rodigues (RR) claim (i) that in classical electrodynamics in vector calculus the distinction between polar and axial vectors and in exterior calculus between twisted and untwisted forms is inappropriate and superfluous, and (ii) that they can derive the Lorentz force equation from Maxwell's equations. As to (i), we point out that the distinction of polar/axial and twisted/untwisted derives from the property of the electric charge of being a pure scalar, that is, not carrying any screw sense. Therefore, the mentioned distinctions are necessary ingredients in any fundamental theory of electrodynamics. … As to (ii), the “derivation” of the Lorentz force from Maxwell's equations, we point out that RR forgot to give the symbol F (the field strength) in Maxwell's equations an operational meaning in the first place. Thus, their proof is empty. Summing up: the approach of RR does not bring in any new insight into the structure of electrodynamics.

    3. Normal frames for general connections (pages 45–52)

      J.M. Nester

      Version of Record online: 2 NOV 2009 | DOI: 10.1002/andp.200910373

      At any point on a manifold certain normal frames that are well adapted to general connections are identified. For manifolds with metrics the series expansion terms for the metric/frame (second order) and the connection (first order) are specified. Some special cases as well as mathematical and physical applications are noted.

    4. Broad band electromagnetic wave absorbers designed with nano-metal films (pages 53–59)

      G. Nimtz and U. Panten

      Version of Record online: 24 NOV 2009 | DOI: 10.1002/andp.200910389

      Thumbnail image of graphical abstract

      In the thirties of the last century it was shown that nano-metal films have a frequency independent absorption in the far infrared regime and below. Moreover, the absorption A of these films is 0.5 and at the same time both reflection R and transmission T are 0.25, complying with the relation A + R + T = 1 at a sheet resistance Z of 60 πΩ. The latter property of nano-metal films was shown by Woltersdorff in 1934. Multiple reflections between such films allow the design of low reflecting large scale absorbers for the wave length range from far infrared to low frequency radio waves. Experimental data of the novel absorber device measured in the GHz frequency range are presented. […] The article presents a brief review of the historical studies on free carrier electromagnetic wave absorption and on novel applications.

    5. Transport through a Kondo quantum dot: Functional RG approach (pages 60–74)

      H. Schmidt and P. Wölfle

      Version of Record online: 16 DEC 2009 | DOI: 10.1002/andp.200910403

      Thumbnail image of graphical abstract

      We apply the functional renormalization group (FRG) method to calculate the conductance of a quantum dot in the Kondo regime. Starting from the exact FRG equations in Keldysh formulation for the Kondo exchange Hamiltonian in pseudo-fermion (pf) representation, we solve the coupled equations for the pf self energy and the coupling function, neglecting three-particle and higher correlation functions. The conductance G as a function of temperature T and bias voltage V is calculated using a renormalized Golden Rule expression. The limiting behavior at T and/or V >> TK (TK: Kondo temperature) agrees with known results. The difficulties when approaching strong coupling are analyzed and improvements are suggested.

    6. Manifestly covariant classical correlation dynamics II. Transport equations and Hakim equilibrium conjecture (pages 75–101)

      C. Tian

      Version of Record online: 14 DEC 2009 | DOI: 10.1002/andp.200910404

      Thumbnail image of graphical abstract

      This is the second of a series of papers on special relativistic classical statistical mechanics. Employing the general theory developed in the first paper, we derive rigorously the relativistic Vlasov, Landau, and Boltzmann equations, respectively. The latter two equations advocate the Jüttner distribution as the equilibrium distribution. We thus, at the fully microscopic level, provide support for the recent numerical findings of Cubero and co-workers of the special relativistic generalization of the Maxwell-Boltzmann distribution. Furthermore, the present theory allows us to calculate rigorously various correlation functions at the relativistic many-body equilibrium. Therefore, we demonstrate that the relativistic many-body equilibrium conjecture of Hakim is justified.

    7. Spatial Wilson loop in continuum, deconfining SU(2) Yang-Mills thermodynamics (pages 102–120)

      J. Ludescher, J. Keller, F. Giacosa and R. Hofmann

      Version of Record online: 16 DEC 2009 | DOI: 10.1002/andp.200910406

      Thumbnail image of graphical abstract

      The uniquess of the effective actions describing 4D SU(2) and SU(3) continuum, infinite-volume Yang-Mills thermodynamics in their deconfining and preconfining phases is made explicit. Subsequently, the spatial string tension is computed in the approach proposed by Korthals-Altes. This SU(2) calculation is based on a particular, effective two-loop correction to the pressure needed for the extraction of the hypothetic number density of isolated and screened magnetic monopoles or antimonopoles in the deconfining phase. By exponentiating the exchange of the tree-level massless but one-loop dressed mode within a quadratic spatial contour of side-length L in the effective theory we demonstrate that for L [RIGHTWARDS ARROW] ∞ the Wilson loop exhibits perimeter law. This is in contrast to a rigorous lattice result subject to the Wilson action and for this action valid at sufficiently high temperature. In the framework of the effective theory there is, however, a regime for small (spatially unresolved) L were the exponent of the spatial Wilson loop possesses curvature as a function of L.

    8. A simple proof of the Kochen-Specker theorem on the problem of hidden variables (pages 121–127)

      N. Straumann

      Version of Record online: 14 DEC 2009 | DOI: 10.1002/andp.200910407

      In this contribution I present a simple derivation of an old result of Kochen and Specker, which is apparently unrelated to the famous work of Bell on hidden variables, but is presumably equally important. Kochen and Specker showed in 1967 that quantum mechanics cannot be embedded into a classical stochastic theory, provided the quantum theoretical probability distributions are reproduced and one additional highly desirable property is satisfied. This showed in a striking manner what were the difficulties in implementing the Einstein programme of a ‘complete’ version of quantum mechanics.

    9. The quasiorder-disorder phase transition and peak effect in MgB2 type-II superconducting materials and thin films (pages 128–135)

      M.J. Chou and H.E. Horng

      Version of Record online: 27 JAN 2010 | DOI: 10.1002/andp.200910409

      The peak effect and the quasiorder-disorder first-order phase transition for Magnesium diboride, MgB2, superconducting bulk materials have been studied. The peak values of the critical current density Jc, and the exact peak positions together with its corresponding half-widths for a constant temperature as well as for a constant applied magnetic field have been calculated by considering the quantum, thermal as well as random fluctuations of the vortex lattice. The results for MgB2 bulk materials are in agreement with the experiment. The peak effect for MgB2 superconducting thin films is also predicted theoretically. The expected peak effect may be observed provided that doping or other experimental techniques are applied to improve the flux pinning of the MgB2 superconducting thin films.

  5. 100 years ago

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Original Papers
    6. 100 years ago
    1. Annalen der Physik. Band 31 (pages 136–139)

      Version of Record online: 27 JAN 2010 | DOI: 10.1002/andp.201090001

      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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