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PHYSICS (543 journals)            First | 1 2 3 4 5 6 | Last

Sri Lankan Journal of Physics     Open Access  
Strain     Hybrid Journal   (Followers: 2)
Strength of Materials     Hybrid Journal   (Followers: 4)
Strength, Fracture and Complexity     Hybrid Journal   (Followers: 1)
Structural Dynamics     Open Access  
Studies In Applied Mathematics     Hybrid Journal   (Followers: 1)
Superconductor Science and Technology     Hybrid Journal   (Followers: 1)
Surface Review and Letters     Hybrid Journal   (Followers: 1)
Surface Science Reports     Full-text available via subscription   (Followers: 12)
Surface Science Spectra     Hybrid Journal  
Surface Topography : Metrology and Properties     Full-text available via subscription  
Synchrotron Radiation News     Hybrid Journal   (Followers: 2)
Synthetic Metals     Hybrid Journal   (Followers: 3)
Technical Physics     Hybrid Journal  
Technical Physics Letters     Hybrid Journal  
Tectonics     Full-text available via subscription   (Followers: 7)
The Astronomy and Astrophysics Review     Hybrid Journal   (Followers: 2)
The Chemical Physics of Solid Surfaces     Full-text available via subscription  
The European Physical Journal H     Hybrid Journal   (Followers: 1)
The European Physical Journal Plus     Open Access  
The International Journal of Multiphysics     Full-text available via subscription   (Followers: 2)
The Physics of Metals and Metallography     Hybrid Journal   (Followers: 1)
The Physics Teacher     Full-text available via subscription   (Followers: 5)
Theoretical and Computational Fluid Dynamics     Hybrid Journal   (Followers: 7)
Theoretical and Mathematical Physics     Hybrid Journal   (Followers: 4)
Transport Theory and Statistical Physics     Hybrid Journal   (Followers: 3)
Tribology International     Hybrid Journal   (Followers: 17)
Tribology Letters     Hybrid Journal   (Followers: 3)
Tribotest     Hybrid Journal   (Followers: 1)
Turkish Journal of Physics     Open Access  
Ultrasonics     Hybrid Journal   (Followers: 4)
Ultrasonics Sonochemistry     Hybrid Journal   (Followers: 2)
Ultrasound in Medicine & Biology     Full-text available via subscription   (Followers: 6)
Universal Journal of Physics and Application     Open Access  
Virtual Journal of Applications of Superconductivity     Hybrid Journal   (Followers: 1)
Virtual Journal of Biological Physics Research     Hybrid Journal   (Followers: 1)
Virtual Journal of Nanoscale Science & Technology     Hybrid Journal   (Followers: 1)
Virtual Journal of Ultrafast Science     Hybrid Journal   (Followers: 7)
Western Journal of Communication     Hybrid Journal   (Followers: 4)
Women & Performance: a journal of feminist theory     Hybrid Journal   (Followers: 2)
Women in Engineering Magazine, IEEE     Full-text available via subscription   (Followers: 8)
World Journal of Condensed Matter Physics     Open Access  
Zeitschrift für angewandte Mathematik und Physik     Hybrid Journal   (Followers: 1)

  First | 1 2 3 4 5 6 | Last

Journal Cover Russian Journal of Mathematical Physics
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
     ISSN (Print) 1531-8621 - ISSN (Online) 1061-9208
     Published by Springer-Verlag Homepage  [2210 journals]   [SJR: 0.924]   [H-I: 21]
  • Analytical study of the tsunami potential model with a simple piston-like
           source. 3. Application of the model in the inverse problem related to the
           Japanese tsunami 2011
    • Abstract: Abstract An approximate solution of the inverse problem of tsunami is given. For the initial data, the marigram with the first registration of the Japanese tsunami of March 11, 2011 on the DART station 21418 and the first registration of the tsunami on the South Ivate GPS buoy are taken. The potential model of tsunami with a simple source of the piston type is used, and estimates for the geographical coordinates of the epicenter and the two characteristic parameters tsunami source are given.
      PubDate: 2014-10-01
  • Mackenzie obstruction for the existence of a transitive Lie algebroid
    • Abstract: Abstract Let g be a finite-dimensional Lie algebra and L be a Lie algebra bundle (LAB). A given coupling Ξ between the LAB L and the tangent bundle TM of a manifold M generates the so-called Mackenzie obstruction Obs(Ξ) ∈ H 3 (M; ZL) to the existence of a transitive Lie algebroid (K. Mackenzie, General Theory of Lie Groupoids and Lie Algebroids, 2005, p. 279). We present two cases of evaluating the Mackenzie obstruction. In the case of a commutative algebra g, the group Aut(g) δ is isomorphic to the group of all matrices GL(g) with the discrete topology. We show that the Mackenzie obstruction for coupling Obs(Ξ) vanishes. The other case describes the Mackenzie obstruction for simply connected manifolds. We prove that, for simply connected manifolds, the Mackenzie obstruction is also trivial, i.e. Obs(Ξ) = 0 ∈ H 3(M; ZL; ∇ Z ).
      PubDate: 2014-10-01
  • On a class of quasirepresentations
    • Abstract: Abstract A class of quasirepresentations is introduced. For an amenable group, every (not necessarily bounded) quasirepresentation in this class with sufficiently small defect admits an ordinary representation of the same group for which the distance from the given quasirepresentation can be estimated using the defect.
      PubDate: 2014-10-01
  • Distributions and differential operators on infinite-dimensional space and
           their application to mathematical quantization of fields
    • Abstract: Abstract We define the notions of distribution half-forms (also called quantum states) on an infinite-dimensional space, and differential operators (also called quantum observables) on the space of these half-forms. This definition depends on the dimensional constant h (the Planck constant). In the limit h → 0, this construction turns into the construction of the Poisson algebra of classical field theory observables (defined earlier) and Maslov-Shvedov’s theory of complex germ. Using these definitions, we give a definition of mathematical quantization of a classical field theory given by a variational principle.
      PubDate: 2014-10-01
  • Density behavior of spatial birth-and-death stochastic evolution of
           mutating genotypes under selection rates
    • Abstract: Abstract We consider birth-and-death stochastic evolution of genotypes with different lengths. The genotypes might mutate, which provides a stochastic changing of lengths by a free diffusion law. The birth and death rates are length dependent, which corresponds to a selection effect. We study an asymptotic behavior of a density for an infinite collection of genotypes. The cases of space homogeneous and space heterogeneous densities are considered.
      PubDate: 2014-10-01
  • Calculation of the number of collective degrees of freedom and of the
           admissible cluster size for isotherms in the Van-der-Waals model in
           supercritical states
    • Abstract: Abstract In this paper, general questions concerning equilibrium and non-equilibrium states are discussed. Using the Van-der-Waals model, the relationship between Gentile statistics and non-ideal gas is demonstrated. The second virial coefficient is expressed in terms of collective degrees of freedom. The admissible cluster size at given temperature is determined.
      PubDate: 2014-10-01
  • Further results involving a class of generalized Hurwitz-Lerch zeta
    • Abstract: Abstract In this paper, we present several new expansion formulas for a class of generalized Hurwitz-Lerch zeta functions which were introduced by Raina and Chhajed [R. K. Raina and P. K. Chhajed, “Certain Results Involving a Class of Functions Associated with the Hurwitz Zeta Function,” Acta Math. Univ. Comenian. 73, 89–100 (2004)] and (more recently) by Srivastava et al. [H. M. Srivastava, M.-J. Luo, and R. K. Raina, “New Results Involving a Class of Generalized Hurwitz-Lerch Zeta Functions and Their Applications,” Turkish J. Anal. Number Theory 1, 26–35 (2013)]. These expansion formulas are obtained with the help of some fractional calculus theorems such as the generalized Leibniz rules, the Taylorlike expansions in terms of different functions and the generalized chain rule. Several (known or new) special cases are also considered.
      PubDate: 2014-10-01
  • Umbral calculus associated with Frobenius-type Eulerian polynomials
    • Abstract: Abstract In this paper, we study some properties of several polynomials arising from umbral calculus. In particular, we investigate the properties of orthogonality type of the Frobeniustype Eulerian polynomials which are derived from umbral calculus. By using our properties, we can derive many interesting identities of special polynomials associated with Frobeniustype Eulerian polynomials. An application to normal ordering is presented.
      PubDate: 2014-10-01
  • On the normal form of knots
    • Abstract: Abstract This paper is a report on the results of computer experiments with an algorithm that takes classical knots to what we call their “normal form” (and so can be used to identify the knot). The algorithm is implemented in a computer animation that shows the isotopy joining the given knot diagram to its normal form. We describe the algorithm, which is a kind of gradient descent along a functional that we define, present a table of normal forms of prime knots with 7 crossings or less, compare it to the knot table of normal forms of wire knots (obtained in [1] by mechanical experiments with real wire models) and (regretfully) present simple examples showing that normal forms obtained by our algorithm are not unique for a given knot type (sometimes isotopic knots can have different normal forms).
      PubDate: 2014-10-01
  • Lyapunov functions in barriers for parabolic equations and in stability
           problems with respect to “white noise”
    • Abstract: Abstract The Cauchy problem for a parabolic equation with a small parameter multiplying the highest derivatives is considered. The dynamical system corresponding to the limit equation of the first order has an asymptotically stable equilibrium. A Lyapunov function known in a neighborhood of this equilibrium is used to construct a barrier in the Cauchy problem for the original parabolic equation. This result is applied to study the dynamical system with respect to random perturbations of the “white noise” type.
      PubDate: 2014-10-01
  • Solutions of the wave equation on hybrid spaces of constant curvature
    • Abstract: Abstract In this paper, we study the wave equation on the simplest hybrid spaces of constant curvature, namely, on Euclidean space or a sphere with a glued ray. We obtain explicit formulas for solutions of the Cauchy problem, which are the simplest nontrivial analogs of Kirchhoff or Herglotz-Petrovsky formulas; especially simple formulas are obtained in the case of three-dimensional Euclidean space with a glued ray. The solutions depend on the boundary conditions at the point of gluing, and these conditions determine the choice of the domain of the Laplace operator; the conditions ensuring the full reflection or full passage of waves are described separately.
      PubDate: 2014-10-01
  • Asymptotics of shallow water equations on the sphere
    • Abstract: Abstract We consider the Shallow Water Equations on the sphere in the basin with nonuniform bottom. Using recently developed approach based on generalized Maslov canonical operator we construct quite explicit asymptotic formulas for the solutions to the Cauchy problem with spatially localized initial data. These solutions in particular describe propagation of tsunami waves in frame of so-called piston model. We discuss the following question: to what extent can the spherical property of the Earth influence the front and the profile (amplitude) of the wave generated by spatially localized momentary sources. We also discuss the problem concerning the influence of the Coriolis force into the solution.
      PubDate: 2014-10-01
  • On the integral law of thermal radiation
    • Abstract: Abstract The integral law of thermal radiation by finite-size emitters is studied. Two geometrical characteristics of a radiating body or a cavity, its volume and its boundary area, define two terms in its radiance. The term defined by the volume corresponds to the Stefan-Boltzmann law. The term defined by the boundary area is proportional to the third power of temperature and inversely proportional to emitter’s effective size, which is defined as the ratio of its volume to its boundary area. This generalized law is valid for arbitrary temperature and effective size. It is shown that the cubic temperature contribution is observed in experiments. This term explains the intrinsic uncertainty of the NPL experiment on radiometric determination of the Stefan-Boltzmann constant. It is also quantitatively confirmed by data from the NIST calibration of cryogenic blackbodies. Its relevance to the size of source effect in optical radiometry is proposed and supported by the experiments on thermal emission from nano-heaters.
      PubDate: 2014-10-01
  • In memoriam
    • PubDate: 2014-07-01
  • Quantum transmission processes and their entropies
    • Abstract: Abstract In classical information theory, one of the most important theorems are the coding theorems, which were discussed by calculating the mean entropy and the mean mutual entropy defined by the classical dynamical entropy (Kolmogorov-Sinai). The quantum dynamical entropy was first studied by Emch [13] and Connes-Stormer [11]. After that, several approaches for introducing the quantum dynamical entropy are done [10, 3, 8, 39, 15, 44, 9, 27, 28, 2, 19, 45]. The efficiency of information transmission for the quantum processes is investigated by using the von Neumann entropy [22] and the Ohya mutual entropy [24]. These entropies were extended to S- mixing entropy by Ohya [26, 27] in general quantum systems. The mean entropy and the mean mutual entropy for the quantum dynamical systems were introduced based on the S- mixing entropy. In this paper, we discuss the efficiency of information transmission to calculate the mean mutual entropy with respect to the modulated initial states and the connected channel for the quantum dynamical systems.
      PubDate: 2014-07-01
  • Zeno dynamics for open quantum systems
    • Abstract: Abstract In this paper, we formulate limit Zeno dynamics of general open systems as the adiabatic elimination of fast components. We are able to exploit previous work on adiabatic elimination of quantum stochastic models to give explicitly the conditions under which open Zeno dynamics will exist. The open systems formulation is further developed as a framework for Zeno master equations, and Zeno filtering (that is, quantum trajectories based on a limit Zeno dynamical model). We discuss several models from the point of view of quantum control. For the case of linear quantum stochastic systems, we present a condition for stability of the asymptotic Zeno dynamics.
      PubDate: 2014-07-01
  • Boyle temperature as a point of ideal gas in gentile statistics and its
           economic interpretation
    • Abstract: Abstract Boyle temperature is interpreted as the temperature at which the formation of dimers becomes impossible. To Irving Fisher’s correspondence principle we assign two more quantities: the number of degrees of freedom, and credit. We determine the danger level of the mass of money M when the mutual trust between economic agents begins to fall.
      PubDate: 2014-07-01
  • General-dyne unravelling of a thermal master equation
    • Abstract: Abstract We analyze the unravelling of the quantum optical master equation at finite temperature due to direct, continuous, general-dyne detection of the environment. We first express the general-dyne Positive Operator Valued Measure (POVM) in terms of the eigenstates of a non-Hermitian operator associated to the general-dyne measurement. Then we derive the stochastic master equation obtained by considering the interaction between the system and a reservoir at thermal equilibrium, which is measured according to the POVM previously determined. Finally, we present a feasible measurement scheme, which reproduces general-dyne detection for any value of the parameter characterizing the stochastic master equation.
      PubDate: 2014-07-01
  • On the Yang-Mills mass gap problem
    • Abstract: Abstract Theorem 4.1 of the author’s paper “Quantum Yang-Mills-Weyl dynamics in the Schroedinger paradigm”, RJMP 21 (2), 169–188 (2014) claims the relative ellipticity of cutoff Yang-Mills quantum energy-mass operators in von Neumann algebras with regular traces. This implies that the spectra of cutoff self-adjoint Yang-Mills energy-mass operators in a nonperturbative quantum Yang-Mills theory (with an arbitrary compact simple gauge group) are nonnegative sequences of the eigenvalues converging to +∞. The spectra are self-similar in the inverse proportion to the running coupling constant. In particular, they have self-similar positive spectral mass gaps. Presumably, this is a solution of the Yang-Mills Millennium problem. The present note shows that the fundamental spectral value of a cutoff quantum Yang-Mills energy-mass operator is the simple zero eigenvalue with the vacuum eigenvector. The direct proof (without von Neumann algebras) is based on the domination over the number operator (with simple fundamental eigenvalue) and the standard spectral variational principle.
      PubDate: 2014-07-01
  • The C*-algebra of the
           electromagnetic field
    • Abstract: Abstract We show that there is a unique C*-algebra for the transverse quantum electromagnetic field obeying the Maxwell equations with any classical charge-current. For nonzero charge, the representation of the C*-algebra differs from the representation with zero charge.
      PubDate: 2014-07-01
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