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Normal frames for general connectionsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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. (Source: Annalen der Physik)
Source: Annalen der Physik - November 3, 2009 Category: Physics Authors: J.M. Nester Source Type: journals

Cover Picture: Ann. Phys. 10-11/2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - October 13, 2009 Category: Physics Tags: Cover Picture Source Type: journals

Annalen der Physik. Band 30Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A closer look into the grand history of Annalen derPhysik: themes which ccupied the minds of physicists one century ago (Source: Annalen der Physik)
Source: Annalen der Physik - October 11, 2009 Category: Physics Tags: 100 years ago Source Type: journals

Book Review: "Introduction to General Relativity", by Lewis RyderEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - October 11, 2009 Category: Physics Authors: Milutin Blagojevi[cacute] Tags: Book Review Source Type: journals

Contents: Ann. Phys. 10-11/2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - October 11, 2009 Category: Physics Tags: Contents Source Type: journals

Thermal dynamics at surfacesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The present paper describes what happens at the surface of a crystal as its temperature steadily increases from zero Kelvin close to the bulk melting temperature. We treat thermal motion, such as the diffusion of individual adatoms establishing mass transport, the formation of adatom or vacancy gases coexisting with islands or steps of the condensed phase, surface phonons and the anharmonicity of the surface potential being markedly different from the one in bulk, as well as thermally induced reconstructions, surface roughening, and finally surface melting, which usually well precedes bulk melting. The paper intends to giv...
Source: Annalen der Physik - October 4, 2009 Category: Physics Authors: H. Brune Source Type: journals

Reduction of quantum fluctuations by anisotropy fields in Heisenberg ferro- and antiferromagnetsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The physical properties of quantum systems, which are described by the anisotropic Heisenberg model, are influenced by thermal as well as by quantum fluctuations. Such a quantum Heisenberg system can be profoundly changed towards a classical system by tuning two parameters, namely the total spin and the anisotropy field: Large easy-axis anisotropy fields, which drive the system towards the classical Ising model, as well as large spin quantum numbers suppress the quantum fluctuations and lead to a classical limit. We elucidate the incipience of this reduction of quantum fluctuations. In order to illustrate the resulting eff...
Source: Annalen der Physik - October 4, 2009 Category: Physics Authors: B. Vogt, S. Kettemann Source Type: journals

Manifestly covariant classical correlation dynamics I. General theoryEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In this series of papers we substantially extend investigations of Israel and Kandrup on nonequilibrium statistical mechanics in the framework of special relativity. This is the first one devoted to the general mathematical structure. Based on the action-at-a-distance formalism we obtain a single-time Liouville equation. This equation describes the manifestly covariant evolution of the distribution function of full classical many-body systems. For such global evolution the Bogoliubov functional assumption is justified. In particular, using the Balescu-Wallenborn projection operator approach we find that the distribution fu...
Source: Annalen der Physik - September 23, 2009 Category: Physics Authors: C. Tian Source Type: journals

Approximate analytical solutions of the pseudospin symmetric Dirac equation for exponential-type potentialsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The solvability of The Dirac equation is studied for the exponential-type potentials with the pseudospin symmetry by using the parametric generalization of the Nikiforov-Uvarov method. The energy eigenvalue equation, and the corresponding Dirac spinors for Morse, Hulthen, and q-deformed Rosen-Morse potentials are obtained within the framework of an approximation to the spin-orbit coupling term, so the solutions are given for any value of the spin-orbit quantum number [kappa] = 0, or [kappa] [ne] 0. (Source: Annalen der Physik)
Source: Annalen der Physik - September 15, 2009 Category: Physics Authors: A. Arda, R. Sever, C. Tezcan Source Type: journals

Improved analytical approximation to arbitrary l-state solutions of the Schrödinger equation for the hyperbolical potentialsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The Schrödinger equation for the rotational-vibrational (ro-vibrational) motion of a diatomic molecule with empirical potential functions is solved approximately by means of the Nikiforov-Uvarov method. The approximate energy spectra and the corresponding normalized total wavefunctions are calculated in closed form and expressed in terms of the hypergeometric functions or Jacobi polynomials Pn([mu], [nu]) (x), where [mu] >-1, [nu] >-1 and x in [-1, +1]. The s-waves analytic solution is obtained. The numerical energy eigenvalues for selected H2 and Ar2 molecules are also calculated and compared with the previous models and...
Source: Annalen der Physik - September 15, 2009 Category: Physics Authors: S.M. Ikhdair, R. Sever Source Type: journals

The "writing on the cosmic wall": Is there a straightforward explanation of the cosmic microwave background?Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The Cosmic Microwave Background (CMB) is taken today as reflecting the thermodynamical state of the universe at these early cosmic times. Based on this assumption and standard cosmological principles meanwhile many fundamental cosmological facts have been deduced from the CMB state which, however, to some surprise reveal that the universe should be dominated by dark energy and dark matter, while for its energy content the usual baryonic matter is nearly negligible. Thus the question which we want to raise in this article is, whether this standard interpretation of the CMB phenomenon is solid and unequivocal enough to suppo...
Source: Annalen der Physik - September 8, 2009 Category: Physics Authors: H.J. Fahr, J.H. Zönnchen Source Type: journals

Indefinite oscillators and black-hole evaporationEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We discuss the dynamics of two harmonic oscillators of which one has a negative kinetic term. This model mimics the Hamiltonian in quantum geometrodynamics, which possesses an indefinite kinetic term. We solve for the time evolution in both the uncoupled and coupled case. We use this setting as a toy model for studying some possible aspects of the final stage of black-hole evaporation. We assume that one oscillator mimics the black hole, while the other mimics Hawking radiation. In the uncoupled case, the negative term leads to a squeezing of the quantum state, while in the coupled case, which includes back reaction, we ge...
Source: Annalen der Physik - September 4, 2009 Category: Physics Authors: C. Kiefer, J. Marto, P.V. Moniz Source Type: journals

On the variational formulation of systems with non-holonomic constraintsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In a previous article by the author, it was shown that one could effectively give a variational formulation to non-conservative mechanical systems by starting with the first variation functional instead of an action functional. In this article, it is shown that this same approach will also allow one to give a variational formulation to systems with non-holonomic constraints. The key is to use an adapted anholonomic local frame field in the formulation, which then implies the replacement of ordinary derivatives with covariant ones. The method is then applied to the case of a vertical disc rolling without slipping or frictio...
Source: Annalen der Physik - August 17, 2009 Category: Physics Authors: D.H. Delphenich Source Type: journals

The influence of self-citation corrections and the fractionalised counting of multi-authored manuscripts on the Hirsch indexEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The Hirsch index or h-index is widely used to quantify the impact of an individual's scientific research output, determining the highest number h of a scientist's papers that received at least h citations. Fractionalised counting of the publications is an appropriate way to distribute the impact of a paper among all the coauthors of a multi-authored manuscript in an easy way, leading to a simple modification hm of the h-index. On the other hand the exclusion of self-citations allows one to sharpen the index, what is appropriate, because self-citations are usually not reflecting the significance of a publication. I have pre...
Source: Annalen der Physik - August 16, 2009 Category: Physics Authors: M. Schreiber Source Type: journals

Low-frequency line temperatures of the CMB (Cosmic Microwave Background)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Based on SU(2) Yang-Mills thermodynamics we interprete Aracde2's and the results of earlier radio-surveys on low-frequency cosmic microwave background (CMB) line temperatures as a phase-boundary effect. We explain the excess at low frequencies by evanescent, nonthermal photon fields of the CMB whose intensity is nulled by that of Planck distributed calibrator photons. The CMB baseline temperature thus is identified with the critical temperature of the deconfining-preconfining transition. (Source: Annalen der Physik)
Source: Annalen der Physik - August 16, 2009 Category: Physics Authors: R. Hofmann Source Type: journals

Mixtures of correlated bosons and fermions: Dynamical mean-field theory for normal and condensed phasesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We derive a dynamical mean-field theory for mixtures of interacting bosons and fermions on a lattice (BF-DMFT). The BF-DMFT is a comprehensive, thermodynamically consistent framework for the theoretical investigation of Bose-Fermi mixtures and is applicable for arbitrary values of the coupling parameters and temperatures. It becomes exact in the limit of high spatial dimensions d or coordination number Z of the lattice. In particular, the BF-DMFT treats normal and condensed bosons on equal footing and thus includes the effects caused by their dynamic coupling. Using the BF-DMFT we investigate two different interaction mode...
Source: Annalen der Physik - August 16, 2009 Category: Physics Authors: K. Byczuk, D. Vollhardt Source Type: journals

Nonlocal transformations for accelerated observersEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
According to the locality postulate of special relativity, the measurements of physical fields by accelerated observers at a given event in Minkowski spacetime are related to each other by the representations of the Lorentz group. Nonlocal extensions of these representations are necessary, however, once acceleration-induced nonlocality is taken into account. The particular case of Dirac spinors is treated in detail and the corresponding nonlocal transformation group is studied. (Source: Annalen der Physik)
Source: Annalen der Physik - August 16, 2009 Category: Physics Authors: B. Mashhoon Source Type: journals

Cover Picture: Ann. Phys. 7-8/2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - August 1, 2009 Category: Physics Tags: Cover Picture Source Type: journals

Elementary processes with two quantum transitionsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Göttinger Dissertation. Reprint of "Über Elementarakte mit zwei Quantensprüngen", Annalen der Physik 9 [401], 273-294 (1931). Translation by Daniel C. Koepke, Montana State University, Department of Physics, Bozeman, MT 59717-3840, USA; e-mail: dkoepke@physics.montana.edu (Source: Annalen der Physik)
Source: Annalen der Physik - July 29, 2009 Category: Physics Authors: M. Göppert-Mayer Tags: Historic Article Source Type: journals

Editorial: Ann. Phys. 7-8/2008Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - July 29, 2009 Category: Physics Authors: U. Eckern Tags: Editorial Source Type: journals

Contents: Ann. Phys. 7-8/2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - July 29, 2009 Category: Physics Tags: Contents Source Type: journals

Ultra-fast dynamics in solids: non-equilibrium behaviour of magnetism and atomic structureEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Non-equilibrium physics is of fundamental interest, for example, for extensions of statistical mechanics and thermodynamics. In particular, it is important to understand how conservation laws like energy conservation and angular-momentum conservation in magnetic solids control the time scale of the dynamics. Laser irradiation may cause intense electronic excitations and thus a strong non-equilibrium state. Results are presented for the ultra-fast response of magnetism in ferromagnetic transition metals like Ni, Co, Fe, and Gd and furthermore of the atomic structure in semiconductors like Si, Ge, and InSb. Non-thermal melti...
Source: Annalen der Physik - July 8, 2009 Category: Physics Authors: K.H. Bennemann Source Type: journals

(0,2) Gauged linear sigma model on supermanifoldEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We construct (0,2), D = 2 gauged linear sigma model on supermanifold with both an Abelian and non-Abelian gauge symmetry. For the purpose of checking the exact supersymmetric (SUSY) invariance of the Lagrangian density, it is convenient to introduce a new operator for the Abelian gauge group. The operator provides consistency conditions for satisfying the SUSY invariance. On the other hand, it is not essential to introduce a similar operator in order to check the exact SUSY invariance of the Lagrangian density of non-Abelian model, contrary to the Abelian one. However, we still need a new operator in order to define the (0...
Source: Annalen der Physik - July 7, 2009 Category: Physics Authors: Y. Okame, M.J. Hayashi Source Type: journals

Entanglement of spin chains with general boundaries and of dissipative systemsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We analyze the entanglement properties of spins (qubits) close to the boundary of spin chains in the vicinity of a quantum critical point and show that the concurrence at the boundary is significantly different from the one of bulk spins. We also discuss the von Neumann entropy of dissipative environments in the vicinity of a (boundary) critical point, such as two Ising-coupled Kondo-impurities or the dissipative two-level system. Our results indicate that the entanglement (concurrence and/or von Neumann entropy) changes abruptly at the point where coherent quantum oscillations cease to exist. The phase transition modifies...
Source: Annalen der Physik - July 6, 2009 Category: Physics Authors: T. Stauber, F. Guinea Source Type: journals

Cover Picture: Ann. Phys. 6/2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - June 21, 2009 Category: Physics Tags: Cover Picture Source Type: journals

Contents: Ann. Phys. 6/2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - June 14, 2009 Category: Physics Tags: Contents Source Type: journals

Annalen der Physik. Band 29Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - June 9, 2009 Category: Physics Tags: 100 years ago Source Type: journals

Intrinsic decoherence in the interaction of two fields with a two-level atomEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We study the interaction of a two-level atom and two fields, one of them classical. We obtain an effective Hamiltonian for this system by using a method recently introduced that produces a small rotation to the Hamiltonian that allows to neglect some terms in the rotated Hamiltonian. Then we solve a variation of the Schrödinger equation that models decoherence as the system evolves through intrinsic mechanisms beyond conventional quantum mechanics rather than dissipative interaction with an environment. (Source: Annalen der Physik)
Source: Annalen der Physik - June 9, 2009 Category: Physics Authors: R. Juárez-Amaro, J.L. Escudero-Jiménez, H. Moya-Cessa Tags: Original Papers Source Type: journals

Five-dimensional relativity and extended elementary particlesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Five-dimensional relativity, based on the 5-dimensional vacuum equations R[mu][nu] = 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. The mass formula of this solution depends on two parameters h > 0 and q > 0, and the mass surface over the (h-q)-plane shows two slits at h= and . These slits can be tentatively identified as hadron branch for h= and lepton branch for . In the slits hadrons and leptons with their masses and ext...
Source: Annalen der Physik - June 9, 2009 Category: Physics Authors: G. Lessner Tags: Original Papers Source Type: journals

The mathematical pendulum from Gauß via Jacobi to RiemannEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
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 for us to not only identify the known real period of the pendulum oscillation, but also to detect a second imaginary period. O...
Source: Annalen der Physik - May 21, 2009 Category: Physics Authors: W. Dittrich Source Type: journals

Gravitoelectromagnetic cavitons in the kinetic regimeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We consider the interaction of gravitational fields (including "gravitoelectromagnetism") with interstellar matter dealing with resonant wave-particle and wave-wave interactions on the basis of magnetic-type Maxwell-Vlasov equations. It is found that the behavior of the perturbed GEM fields, the perturbed density and self-generated gravitomagnetic field with very low frequency, can be described by the nonlinear coupling Eqs. (98-100). Numerical results show that they may collapse. In other words, due to self-focusing, a stronger GEM fields magnified up to 103 times, could be produced; they are the GEM cavitons, describing ...
Source: Annalen der Physik - May 19, 2009 Category: Physics Authors: X.Q. Li, S.Q. Liu, X.Y. Tao Source Type: journals

Nonequilibrium quantum anharmonic oscillator and scalar field: high temperature approximationsEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We treat a relativistic quantum boson gas, described by a scalar quantum field, with quartic self-interaction ([phis]4) in three spatial dimensions: we review the known equilibrium case and present new proposals off-equilibrium. For high temperature and large spatial scales, the behaviour of the gas at equilibrium simplifies nonperturbatively (equilibrium dimensional reduction or EDR): its thermodynamics is described by classical statistical mechanics with some quantum field effects. By assumption, the initial state of the gas off-equilibrium includes interactions and inhomogeneities and is not far from thermal equilibrium...
Source: Annalen der Physik - May 19, 2009 Category: Physics Authors: R.F. Alvarez-Estrada Source Type: journals

Cover Picture: Ann. Phys. 5/2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - May 8, 2009 Category: Physics Tags: Cover Picture Source Type: journals

Quantum field theory and composite fermions in the fractional quantum Hall effectEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We derive a composite fermion model for the fractional quantum Hall effect from relativistic quantum electrodynamics. With simple arguments it is shown that a special Chern Simons transformation of the Dirac electrons in four spacetime dimensions leads in the low energy limit to a single particle Hamiltonian for composite fermions in three dimensions with correction terms such as Rashba- or Dresselhaus-spin-orbit coupling and zitterbewegung. Furthermore we provide a mechanism to quantum-mechanically project the quantum fields defined in the four dimensional Minkowski space to three dimensions. This leads to a relativistic ...
Source: Annalen der Physik - May 5, 2009 Category: Physics Authors: M. Kossow Tags: Original Paper Source Type: journals

Contents: Ann. Phys. 5/2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - May 5, 2009 Category: Physics Tags: Contents Source Type: journals

Cover Picture: Ann. Phys. 4/2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - April 16, 2009 Category: Physics Tags: Cover Picture Source Type: journals

Rigorous solution of a Hubbard model extended by nearest-neighbour Coulomb and isotropic exchange interaction on a triangle and tetrahedronEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - April 15, 2009 Category: Physics Authors: R. Schumann Tags: Erratum Source Type: journals

Thermal photon dispersion law and modified black-body spectraEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Based on the postulate that photon propagation is governed by an SU(2) gauge principle we numerically compute the one-loop dispersion for thermalized photon propagation on the radiatively induced mass shell. Formerly, the dispersion was addressed by assuming p2 = 0. While this approximation turns out to be excellent for temperatures [le] 2 TCMB the exact result exhibits a much faster (power-like) shrinking of the gap in the black-body spectral intensity with rising temperature. Our previous statements on anomalous large-angle CMB temperature-temperature correlations, obtained in the approximation p2 = 0, remain valid. (Sou...
Source: Annalen der Physik - April 15, 2009 Category: Physics Authors: J. Ludescher, R. Hofmann Tags: Original Papers Source Type: journals

On the pre-metric foundations of wave mechanics I: massless wavesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The mechanics of wave motion in a medium are founded in conservation laws for the physical quantities that the waves carry, combined with the constitutive laws of the medium, and define Lorentzian structures only in degenerate cases of the dispersion laws that follow from the field equations. It is suggested that the transition from wave motion to point motion is best factored into an intermediate step of extended matter motion, which then makes the dimension-codimension duality of waves and trajectories a natural consequence of the bicharacteristic (geodesic) foliation associated with the dispersion law. This process is i...
Source: Annalen der Physik - April 15, 2009 Category: Physics Authors: D.H. Delphenich Tags: Original Papers Source Type: journals

Evaluation of the scientific impact, productivity and biological age based upon the h-index in three Latin American countries: the materials science caseEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We discuss the scientific impact of Latin American scientists in the field of materials science. The analysis is based on the h-index as the scientometric index used to quantify the scientific productivity of an individual. In particular, we focus our analysis in México, Chile and Colombia. We compare the level of productivity between all these countries. We also analyzed the h-index as function of the biological age, by using the first year of publication of a given scientists as a reference and discussed the general distribution of its quantification. We do not find a clear relationship between these two quantities. Bas...
Source: Annalen der Physik - April 15, 2009 Category: Physics Authors: A.H. Romero, A. García, M. Kiwi Tags: Original Papers Source Type: journals

Improved analytical approximation to arbitrary l-state solutions of the Schrödinger equation for the hyperbolical potentialEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
A new approximation scheme to the centrifugal term is proposed to obtain the l [ne] 0 bound-state solutions of the Schrödinger equation for an exponential-type potential in the framework of the hypergeometric method. The corresponding normalized wave functions are also found in terms of the Jacobi polynomials. To show the accuracy of the new proposed approximation scheme, we calculate the energy eigenvalues numerically for arbitrary quantum numbers n and l with two different values of the potential parameter [sigma]0. Our numerical results are of high accuracy like the other numerical results obtained by using program bas...
Source: Annalen der Physik - April 15, 2009 Category: Physics Authors: S.M. Ikhdair, R. Sever Tags: Original Papers Source Type: journals

Contents: Ann. Phys. 4/2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - April 15, 2009 Category: Physics Tags: Contents Source Type: journals

A new look at Bell's inequalities and Nelson's theoremEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In 1985, Edward Nelson, who formulated the theory of stochastic mechanics, made an interesting remark about Bell's theorem. Nelson analysed the latter in the light of classical fields that behave randomly. He found that if a stochastic hidden variable theory fulfils certain conditions, the inequality of Bell can be violated. Moreover, Nelson was able to prove that this may happen without any instantaneous communication between the two spatially separated measurement stations. Since Nelson's article got almost overlooked by physicists, we try to review his comments on the theorem. We argue that a modification of stochastic ...
Source: Annalen der Physik - March 23, 2009 Category: Physics Authors: B. Schulz Source Type: journals

Stripe segregation and magnetic coupling in the nickelate La5/3Sr1/3NiO4Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
We investigate the consequences of the stripe formation in the nickelate La5/3Sr1/3NiO4 for the details of its crystal structure and electronic states. Our data are based on numerical simulations within density functional theory (DFT) and the generalized gradient approximation (GGA). The on-site Coulomb interaction is included in terms of the LDA+U scheme. Structure optimization of preliminary experimental data indicates a strong interaction between the structural and electronic degrees of freedom. In particular, we find a segregation of the diagonal filled stripes induced by a delicate interplay with the magnetic coupling...
Source: Annalen der Physik - March 7, 2009 Category: Physics Authors: U. Schwingenschlögl, C. Schuster, R. Frésard Source Type: journals

The odd couple: Boltzmann, Planck and the application of statistics to physics (1900-1913)Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
In the last forty years a vast scholarship has been dedicated to the reconstruction of Planck's theory of black-body radiation and to the historical meaning of quantization. Since the introduction of quanta took place for combinatorial reasons, Planck's understanding of statistics must have played an important role. In the first part of this paper, I sum up the main theses concerning the status of the quantum and compare the arguments supporting them. In the second part, I investigate Planck's usage of statistical methods and the relation to Boltzmann's analogous procedure. I will argue that this way of attacking the probl...
Source: Annalen der Physik - March 2, 2009 Category: Physics Authors: M. Badino Tags: Original Papers Source Type: journals

Deformation kinetics within cylindrical micropores of glassy solid 4He at very low temperaturesEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The deformation kinetics for glassy solid helium confined in microscopic domain at very low temperature regime was investigated using a transition-rate-state dependent model considering the shear thinning behavior which means, once material being subjected to high shear rates, the viscosity diminishes with increasing shear rate. The preliminary results show that there might be nearly frictionless fields for rate of deformation due to the almost vanishing shear stress in micropores at very low temperature regime subjected to some surface conditions: The relatively larger roughness (compared to the macroscopic domain) inside...
Source: Annalen der Physik - March 2, 2009 Category: Physics Authors: Chu Z. K.-H., S.-J. Liu, C. Qin Tags: Original Papers Source Type: journals

On the multipole moments of a rigidly rotating fluid bodyEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
Based on numerical simulations and analytical calculations we formulate a new conjecture concerning the multipole moments of a rigidly rotating fluid body in equilibrium. The conjecture implies that the exterior region of such a fluid is not described by the Kerr metric. (Source: Annalen der Physik)
Source: Annalen der Physik - March 2, 2009 Category: Physics Authors: R. Filter, A. Kleinwächter Tags: Original Papers Source Type: journals

Cover Picture: Ann. Phys. 1/2009Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - January 23, 2009 Category: Physics Tags: Cover Picture Source Type: journals

A look at the abandoned contributions to cosmology of Dirac, Sciama, and DickeEmail this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
The separate contributions to cosmology of the above researchers are revisited and a cosmology encompassing their basic ideas is proposed. We study Dirac's article (1938) on the large number hypothesis, Sciama's proposal (1953) of realizing Mach's principle, and Dicke's considerations (1957) on a flat-space representation of general relativity with a variable speed of light (VSL). Dicke's tentative theory can be formulated in a way which is compatible with Sciama's hypothesis on the gravitational constant G. Additionally, such a cosmological model is shown to satisfy Dirac's second 'large number' hypothesis on the total nu...
Source: Annalen der Physik - January 22, 2009 Category: Physics Authors: A. Unzicker Tags: Original Papers Source Type: journals

Annalen der Physik. Band 28Email this article to a colleague. Save this article to My Clippings. Discuss or comment on this article.
No abstract. (Source: Annalen der Physik)
Source: Annalen der Physik - January 21, 2009 Category: Physics Tags: 100 years ago Source Type: journals