Physical Review E

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  1. Synchronization transitions on scale-free neuronal networks due to finite information transmission delays.

    Physical Review E 80(2 Pt 2):026206 (2009) PMID 19792230

    We investigate front propagation and synchronization transitions in dependence on the information transmission delay and coupling strength over scale-free neuronal networks with different average degrees and scaling exponents. As the underlying model of neuronal dynamics, we use the efficient Ru...
  2. Critical exponents for the homology of Fortuin-Kasteleyn clusters on a torus.

    Physical Review E 80(2 Pt 1):021130 (2009) PMID 19792100

    A Fortuin-Kasteleyn cluster on a torus is said to be of type {a,b},a,b in Z , if it is possible to draw a curve belonging to the cluster that winds a times around the first cycle of the torus as it winds -b times around the second. Even though the Q -Potts models make sense only for Q integers, ...
  3. Fokker-Planck equation in a wedge domain: anomalous diffusion and survival probability.

    Physical Review E 80(2 Pt 1):021131 (2009) PMID 19792101

    We obtain exact solutions and the survival probability for a Fokker-Planck equation subjected to the two-dimensional wedge domain. We consider a spatial dependence in the diffusion coefficient and the presence of external forces. The results show an anomalous spreading of the solution and, conse...
  4. Hydrodynamics of helical-shaped bacterial motility.

    Physical Review E 80(2 Pt 1):021921 (2009) PMID 19792165

    To reveal the underlying hydrodynamic mechanism for the directed propulsion of the bacterium Spiroplasma, we formulate a coarse-grained elastic polymer model with domains of alternating helicities along the contour. Using hydrodynamic simulations and analytic arguments, we show that the propagat...
  5. Electrodynamic Casimir effect in a medium-filled wedge. II.

    Physical Review E 80(2 Pt 1):021125 (2009) PMID 19792095

    We consider the Casimir energy in a geometry of an infinite magnetodielectric wedge closed by a circularly cylindrical, perfectly reflecting arc embedded in another magnetodielectric medium, under the condition that the speed of light be the same in both media. An expression for the Casimir ener...
  6. Cooperation in an evolutionary prisoner's dilemma on networks with degree-degree correlations.

    Physical Review E 80(2 Pt 2):026105 (2009) PMID 19792198

    We study the effects of degree-degree correlations on the success of cooperation in an evolutionary prisoner's dilemma played on a random network. When degree-degree correlations are not present, the standardized variance of the network's degree distribution has been shown to be an accurate anal...
  7. Hierarchical self-assembly of asymmetric amphiphatic spherical colloidal particles.

    Physical Review E 80(2 Pt 1):021404 (2009) PMID 19792121

    From dumbbells to fcc crystals, we study the self-assembly pathway of amphiphatic spherical colloidal particles as a function of the size of the hydrophobic region using molecular-dynamics simulations. Specifically, we analyze how local interparticle interactions correlate to the final self-asse...
  8. Scaling theory for steady-state plastic flows in amorphous solids.

    Physical Review E 80(2 Pt 2):026128 (2009) PMID 19792221

    Strongly correlated amorphous solids are a class of glass formers whose interparticle potential admits an approximate inverse power-law form in a relevant range of interparticle distances. We study the steady-state plastic flow of such systems, first in the athermal quasistatic limit and second ...
  9. Time-resolved fluorescence spectroscopy of two-photon laser-excited 8p, 9p, 5f, and 6f levels in neutral xenon.

    Physical Review E 80(2 Pt 2):026401 (2009) PMID 19792262

    Laser-induced fluorescence of two-photon excited 8p, 9p, J=0, 2 and 5f, 6f, J=2 levels in neutral xenon has been investigated in the pressure regime between 4 and 120 Pa. Radiative lifetimes and collisional deactivation rates have been deduced especially for the 5f[3/2](2), 5f[5/2](2), and 8p[1/...
  10. Multiplicative cascades and seismicity in natural time.

    Physical Review E 80(2 Pt 1):022102 (2009) PMID 19792180

    Natural time chi enables the distinction of two origins of self-similarity, i.e., the process memory and the process increments infinite variance. Employing multiplicative cascades in natural time, the most probable value of the variance kappa(1)(is identical to chi(2)-chi(2))is explicitly relat...
  11. Equilibrium-restricted solid-on-solid growth model on fractal substrates.

    Physical Review E 80(2 Pt 1):021101 (2009) PMID 19792071

    The equilibrium-restricted solid-on-solid growth model on fractal substrates is studied by introducing a fractional Langevin equation. The growth exponent beta and the roughness exponent alpha defined, respectively, by the surface width via W approximately t(beta) and the saturated width via W(s...
  12. Human activity in the web.

    Physical Review E 80(2 Pt 2):026118 (2009) PMID 19792211

    The recent information technology revolution has enabled the analysis and processing of large-scale data sets describing human activities. The main source of data is represented by the web, where humans generally use to spend a relevant part of their day. Here, we study three large data sets con...
  13. Reconstruction algorithm for single-particle diffraction imaging experiments.

    Physical Review E 80(2 Pt 2):026705 (2009) PMID 19792279

    We introduce the EMC algorithm for reconstructing a particle's three-dimensional (3D) diffraction intensity from very many photon shot-noise limited two-dimensional measurements, when the particle orientation in each measurement is unknown. The algorithm combines a maximization step (M) of the i...
  14. Nonuniversality and the role of tails in reaction-subdiffusion fronts.

    Physical Review E 80(2 Pt 1):021133 (2009) PMID 19792103

    Recently there has been a certain controversy about the scaling properties of reaction-subdiffusion fronts. Some works seem to suggest that these fronts should move with constant speed, as do classical reaction-diffusion fronts, while other authors have predicted propagation failure, i.e., that ...
  15. Spatiotemporal evolution of Poiseuille-Rayleigh-Bénard flows in binary fluids with Soret effect under initial pulselike disturbances.

    Physical Review E 80(2 Pt 2):026312 (2009) PMID 19792254

    The spatiotemporal evolution of Poiseuille-Rayleigh-Bénard flows in binary fluids with Soret effect is investigated by carrying out fully nonlinear two-dimensional numerical simulations initiated by a pulselike disturbance. The traveling wave packets for positive as well as negative separation f...
  16. Effect of mixing and spatial dimension on the glass transition.

    Physical Review E 80(2 Pt 1):021503 (2009) PMID 19792129

    We study the influence of composition changes on the glass transition of binary hard disk and hard sphere mixtures in the framework of mode coupling theory. We derive a general expression for the slope of a glass transition line. Applied to the binary mixture in the low concentration limits, thi...
  17. Emerging attractors and the transition from dissipative to conservative dynamics.

    Physical Review E 80(2 Pt 2):026205 (2009) PMID 19792229

    The topological structure of basin boundaries plays a fundamental role in the sensitivity to the final state in chaotic dynamical systems. Herewith we present a study on the dynamics of dissipative systems close to the Hamiltonian limit, emphasizing the increasing number of periodic attractors, ...
  18. Fidelity susceptibility in the two-dimensional transverse-field Ising and XXZ models.

    Physical Review E 80(2 Pt 1):021108 (2009) PMID 19792078

    We study the fidelity susceptibility in the two-dimensional (2D) transverse-field Ising model and the 2D XXZ model numerically. It is found that in both models, the fidelity susceptibility as a function of the driving parameter diverges at the critical points. The validity of the fidelity suscep...
  19. Large excursions of action within the resonance of a degenerate Hamiltonian system with two degrees of freedom.

    Physical Review E 80(2 Pt 2):026216 (2009) PMID 19792240

    We investigate the width of the resonance zone in a degenerate Hamiltonian system with two degrees of freedom, in which the Hamiltonian lacks the quadratic term in the Taylor expansion. This leads to larger excursions of action in the phase space than the nondegenerate one, and corresponding res...
  20. Swimming in granular media.

    Physical Review E 80(2 Pt 1):020301 (2009) PMID 19792063

    A class of reptiles known as sand swimmers adapts to hot environments by submerging beneath desert sands during the day and so provide a unique probe into the dynamics of intruders in granular beds. To understand the mechanism for swimming in an otherwise solid bed, we study a simple model of pe...