We study diffusion on a periodic billiard table with an infinite horizon in the limit of narrow corridors. An effective trapping mechanism emerges according to which the process can be modeled by a Lévy walk combining exponentially distributed trapping times with free propagation along paths whose p...

[Phys. Rev. E 90, 050102] Published Wed Nov 26, 2014

]]> We study the statistics of the condition number κ=λ_{max}/λ_{min} (the ratio between largest and smallest squared singular values) of N×M Gaussian random matrices. Using a Coulomb fluid technique, we derive analytically and for large N the cumulative P(κ<x) and tail-cumulative P(κ>x) distributions o...

[Phys. Rev. E 90, 050103] Published Wed Nov 26, 2014

]]>The authors propose and analyze a minimal stochastic model that can predict rapid evolution in predator-prey systems. The paper presents simulations that are relevant to a recent experimental study. Their theoretical model should be useful to estimate the risk of extinction and the impact of environmental changes in a number of ecosystems.

[Phys. Rev. E 90, 050702] Published Wed Nov 26, 2014

]]>In this work we study the thermal rectification efficiency of a one-dimensional mass-graded anharmonic oscillator lattice at large system sizes. A modest increase in rectification is observed. When the magnitude of the mass gradient scales with the system size, the aforementioned effect increases su...

[Phys. Rev. E 90, 052152] Published Wed Nov 26, 2014

]]>It is difficult to relate the properties of liquids and glasses directly to their structure because of complexity in the structure that defies precise definition. The potential energy landscape (PEL) approach is a very insightful way to conceptualize the structure-property relationship in liquids an...

[Phys. Rev. E 90, 052307] Published Wed Nov 26, 2014

]]>Inspired by microscopic Paramecia which use trichocyst extrusion to propel themselves away from thermal aggression, we propose a macroscopic experiment to study the stability of a slender beam extruded in a highly viscous fluid. Piano wires were extruded axially at constant speed in a tank filled wi...

[Phys. Rev. E 90, 052718] Published Wed Nov 26, 2014

]]> Many-particle effects in escapes of hard disks from a square box via a hole are discussed in a viewpoint of dynamical systems. Starting from N disks in the box at the initial time, we calculate the probability P_{n}(t) for at least n disks to remain inside the box at time t for n=1,2,...,N. At early ti...

[Phys. Rev. E 90, 052923] Published Wed Nov 26, 2014

]]> A two-level atomic system as a working substance is used to set up a refrigerator consisting of two quantum adiabatic and two isochoric processes (two constant-frequency processes ω_{a} and ω_{b} with ω_{a}<ω_{b}), during which the two-level system is in contact with two heat reservoirs at temperatures T_{h} an...

[Phys. Rev. E 90, 052151] Published Tue Nov 25, 2014

]]>The mode-coupling theory of the glass transition treats the dynamics of supercooled liquids in terms of two-point density correlation functions. Here we consider a generalized, hierarchical formulation of schematic mode-coupling equations in which the full basis of multipoint density correlations is...

[Phys. Rev. E 90, 052306] Published Tue Nov 25, 2014

]]>Cooperation among unrelated individuals is frequently observed in social groups when their members combine efforts and resources to obtain a shared benefit that is unachievable by an individual alone. However, understanding why cooperation arises despite the natural tendency of individuals toward se...

[Phys. Rev. E 90, 052825] Published Tue Nov 25, 2014

]]>We investigated experimentally the ray-wave correspondence in organic microlasers of various triangular shapes. Triangular billiards are of interest since they are the simplest cases of polygonal billiards and the existence and properties of periodic orbits in triangles are not yet fully understood....

[Phys. Rev. E 90, 052922] Published Tue Nov 25, 2014

]]>Although there have been several experimental and numerical works on rapidly rupturing films, measurement of the spatial-temporal temperature during rupturing processes is lacking. Using molecular dynamics simulations, we show that a rupturing film with nanometer thickness generates a non-negligible...

[Phys. Rev. E 90, 051004] Published Mon Nov 24, 2014

]]>We establish the relation of the second virial coefficient of a recently proposed (μ̃,q)-deformed Bose gas model [A. M. Gavrilik and Yu. A. Mishchenko, Ukr. J. Phys. 58, 1171 (2013)] to the interaction and compositeness parameters when either of these factors is taken into account separately. When t...

[Phys. Rev. E 90, 052147] Published Mon Nov 24, 2014

]]>The rate of convergence in extreme value statistics is nonuniversal and can be arbitrarily slow. Further, the relative error can be unbounded in the tail of the approximation, leading to difficulty in extrapolating the extreme value fit beyond the available data. We introduce the T method, and show ...

[Phys. Rev. E 90, 052148] Published Mon Nov 24, 2014

]]>The maximum entropy method—used to infer probabilistic models from data—is a special case of Bayes's model inference prescription which, in turn, is grounded in basic propositional logic. By contrast to the maximum entropy method, the compatibility of nonadditive entropy maximization with Bayes's mo...

[Phys. Rev. E 90, 052149] Published Mon Nov 24, 2014

]]>Given two time series, can one faithfully tell, in a rigorous and quantitative way, the cause and effect between them? Based on a recently rigorized physical notion, namely, information flow, we solve an inverse problem and give this important and challenging question, which is of interest in a wide...

[Phys. Rev. E 90, 052150] Published Mon Nov 24, 2014

]]>We present the results of an experimental investigation into the effects of a sinusoidal modulation of the rotation rate on the segregation patterns formed in thin drum of granular material. The modulation transforms the base pattern formed under steady conditions by splitting or merging the initial...

[Phys. Rev. E 90, 052205] Published Mon Nov 24, 2014

]]>The first ever molecular-scale simulation of cross-flow migration effects in dense polymer melts is presented; simulations for both unentangled and entangled chains are presented. At quiescence a small depletion next to the wall for the segmental densities of longer chains is present, a correspondin...

[Phys. Rev. E 90, 052603] Published Mon Nov 24, 2014

]]>We study the self-avoiding walk on complex fractal networks called the (u,v)-flower by mapping it to the N-vector model in a generating function formalism. First, we analytically calculate the critical exponent ν and the connective constant by a renormalization-group analysis in arbitrary fractal di...

[Phys. Rev. E 90, 052821] Published Mon Nov 24, 2014

]]>Diverse biological networks exhibit universal features distinguished from those of random networks, calling much attention to their origins and implications. Here we propose a minimal evolution model of Boolean regulatory networks, which evolve by selectively rewiring links towards enhancing adaptab...

[Phys. Rev. E 90, 052822] Published Mon Nov 24, 2014

]]>In the collective-risk social dilemma, players lose their personal endowments if contributions to the common pool are too small. This fact alone, however, does not always deter selfish individuals from defecting. The temptations to free ride on the prosocial efforts of others are strong because we a...

[Phys. Rev. E 90, 052823] Published Mon Nov 24, 2014

]]>Random graph models have played a dominant role in the theoretical study of networked systems. The Poisson random graph of Erdős and Rényi, in particular, as well as the so-called configuration model, have served as the starting point for numerous calculations. In this paper we describe another larg...

[Phys. Rev. E 90, 052824] Published Mon Nov 24, 2014

]]>We study the formation of gap solitons in the presence of a parametric pump. It is shown that a parametric pump can stabilize stationary solitons continuously emitting dispersive waves. The resonant interactions of the radiation and the solitons are studied and it is shown that the solitons can be e...

[Phys. Rev. E 90, 052918] Published Mon Nov 24, 2014

]]>Application of electrical forcing to release pinned spiral waves from unexcitable obstacles and to terminate the rotation of free spiral waves at the boundary of excitable media has been investigated in thin layers of the Belousov-Zhabotinsky (BZ) reaction, prepared with different initial concentrat...

[Phys. Rev. E 90, 052919] Published Mon Nov 24, 2014

]]>We identify the relative amount of short cyclic motifs as an important topological factor in networks of time-delayed Kuramoto oscillators. The patterns emerging from the cyclic motifs are most clearly distinguishable in the average frequency and the momentary frequency dispersion as a function of t...

[Phys. Rev. E 90, 052920] Published Mon Nov 24, 2014

]]>We investigate the compactlike pulse signal propagation in a two-dimensional nonlinear electrical transmission network with the intersite circuit elements (both in the propagation and transverse directions) acting as nonlinear resistances. Model equations for the circuit are derived and can reduce f...

[Phys. Rev. E 90, 052921] Published Mon Nov 24, 2014

]]>The motion of a red blood cell suspended in a linear shear flow adjacent to a fixed boundary subject to an applied lateral force directed toward the boundary is simulated. A two-dimensional model is used that represents the viscous and elastic properties of normal red blood cells. Shear rates in the...

[Phys. Rev. E 90, 053014] Published Mon Nov 24, 2014

]]>Simulations of microflows usually require sophisticated numerical tools. Nevertheless in the slip regime, the hydrodynamic equation with slip boundary condition may be sufficient to account for the so-called Klinkenberg effect. We propose to visit this effect using a basic network of microchannels i...

[Phys. Rev. E 90, 053015] Published Mon Nov 24, 2014

]]> To understand the CO_{2} sequestration in the saline aquifer, the effect of a first-order chemical reaction on the onset of the buoyancy-driven instability in an isotropic reactive porous medium is analyzed theoretically. Under the linear stability theory, the stability equations are derived in the sem...

[Phys. Rev. E 90, 053016] Published Mon Nov 24, 2014

]]>The extended optical theorem is generalized for scalar acoustical beams of arbitrary character with any angle of incidence interacting with an object of arbitrary geometric shape and size, and placed randomly in the beam's path with any scattering angle. Analytical expressions for the extinction, ab...

[Phys. Rev. E 90, 053204] Published Mon Nov 24, 2014

]]>Unlike conventional computational fluid dynamics methods, the lattice Boltzmann method (LBM) describes the dynamic behavior of fluids in a mesoscopic scale based on discrete forms of kinetic equations. In this scale, complex macroscopic phenomena like the formation and collapse of interfaces can be ...

[Phys. Rev. E 90, 053310] Published Mon Nov 24, 2014

]]>We establish experimentally the flow patterns of induced-charge electro-osmosis around immobilized metallic spheres in aqueous electrolyte. The ac field modifies local electrolyte concentration and causes quadrupolar flows with inward velocities being smaller than the outward ones. At high fields, t...

[Phys. Rev. E 90, 051002] Published Fri Nov 21, 2014

]]>We demonstrate that systems with a parameter-controlled inverse cascade can exhibit critical behavior for which at the critical value of the control parameter the inverse cascade stops. In the vicinity of such a critical point, standard phenomenological estimates for the energy balance will fail sin...

[Phys. Rev. E 90, 051003] Published Fri Nov 21, 2014

]]>The x-ray laser-matter interaction for a low-Z material, carbon, is studied with a particle-in-cell code that solves the photoionization and x-ray transport self-consistently. Photoionization is the dominant absorption mechanism and nonthermal photoelectrons are produced with energy near the x-ray p...

[Phys. Rev. E 90, 051102] Published Fri Nov 21, 2014

]]>Using the fluctuation theorem supplemented with geometric arguments, we derive universal features of the (long-time) efficiency fluctuations for thermal and isothermal machines operating under steady or periodic driving, close or far from equilibrium. In particular, the probabilities for observing t...

[Phys. Rev. E 90, 052145] Published Fri Nov 21, 2014

]]>The nonlinear relaxation time and the statistics of the first passage time distribution in connection with the quasideterministic approach are used to detect weak signals in the decay process of the unstable state of a Brownian particle embedded in memory thermal baths. The study is performed in the...

[Phys. Rev. E 90, 052146] Published Fri Nov 21, 2014

]]>This work presents extensive microcanonical molecular dynamics simulations of a Lennard-Jones liquid to directly measure the rate of bubble nucleation. Nucleation rates are found that are in reasonable agreement with classical nucleation theory, and local hot spots, which were reported in earlier simulations, are not observed.

[Phys. Rev. E 90, 052407] Published Fri Nov 21, 2014

]]>A walker is a droplet bouncing on a liquid surface and propelled by the waves that it generates. This macroscopic wave-particle association exhibits behaviors reminiscent of quantum particles. This article presents a toy model of the coupling between a particle and a confined standing wave. The resu...

[Phys. Rev. E 90, 052917] Published Fri Nov 21, 2014

]]>We here present a simple fitting-parameter-free theory of the Leidenfrost effect (droplet levitation above a superheated plate) covering the full range of stable shapes, i.e., from small quasispherical droplets to larger puddles floating on a pocketlike vapor film. The geometry of this film is found...

[Phys. Rev. E 90, 053011] Published Fri Nov 21, 2014

]]>The accurate prediction and control of the interaction of liquids with hot surfaces is paramount in numerous areas, including cooling applications. We present results illustrating the effect of ambient pressure on the temperature required for a droplet to levitate over a hot surface, i.e., the Leide...

[Phys. Rev. E 90, 053012] Published Fri Nov 21, 2014

]]>The swimming velocity and rate of dissipation of a linear chain consisting of two or three little spheres and a big sphere is studied on the basis of low Reynolds number hydrodynamics. The big sphere is treated as a passive cargo, driven by the tail of little spheres via hydrodynamic and direct elas...

[Phys. Rev. E 90, 053013] Published Fri Nov 21, 2014

]]>We study the Dean instability in curved channels using the lattice Boltzmann model for generalized metrics. For this purpose, we first improve and validate the method by measuring the critical Dean number at the transition from laminar to vortex flow for a streamwise curved rectangular channel, obta...

[Phys. Rev. E 90, 053308] Published Fri Nov 21, 2014

]]>The energy spectral density E(k), where k is the spatial wave number, is a well-known diagnostic of homogeneous turbulence and magnetohydrodynamic turbulence. However, in most of the curves plotted by different authors, some systematic kinks can be observed at k=9, 15, and 19. We claim that these ki...

[Phys. Rev. E 90, 053309] Published Fri Nov 21, 2014

]]>Recent developments in theoretical aspects of spin noise and relaxation and their interrelationship reveal a modified spin density, distinct from the density matrix, as the necessary object to describe fluctuations in spin systems. These fluctuations are to be viewed as an intrinsic quantum mechanic...

[Phys. Rev. E 90, 052144] Published Thu Nov 20, 2014

]]>We study the ballistic deposition and the grain deposition models on two-dimensional substrates. Using the Kardar-Parisi-Zhang (KPZ) ansatz for height fluctuations, we show that the main contribution to the intrinsic width, which causes strong corrections to the scaling, comes from the fluctuations ...

[Phys. Rev. E 90, 052405] Published Thu Nov 20, 2014

]]>The statistical methods exploiting the “Correlation-Functions” or the “Differential-Critical-Region” are both suitable for describing phase transformation kinetics ruled by nucleation and growth. We present a critical analysis of these two approaches, with particular emphasis to transformations rule...

[Phys. Rev. E 90, 052406] Published Thu Nov 20, 2014

]]>A wide range of interacting systems can be described by complex networks. A common feature of such networks is that they consist of several communities or modules, the degree of which may quantified as the modularity. However, even a random uncorrelated network, which has no obvious modular structur...

[Phys. Rev. E 90, 052140] Published Wed Nov 19, 2014

]]>The purpose of this paper is to provide a new formula for the effective diffusion coefficient of a generalized Fick-Jacobs equation for narrow three-dimensional channels. The generalized Fick-Jacobs equation is obtained by projecting the three-dimensional diffusion equation along the normal directio...

[Phys. Rev. E 90, 052141] Published Wed Nov 19, 2014

]]>We revisit the self-contained quantum refrigerator in the strong-internal-coupling regime by employing the quantum optical master equation. It is shown that strong internal coupling reduces the cooling ability of the refrigerator. In contrast to the weak-coupling case, strong internal coupling could...

[Phys. Rev. E 90, 052142] Published Wed Nov 19, 2014

]]>We use large scale computer simulations of a glass-forming liquid in which a fraction c of the particles has been permanently pinned. We find that the relaxation dynamics shows an exponential dependence on c. This result can be rationalized by assuming that the configurational entropy of the pinned ...

[Phys. Rev. E 90, 052305] Published Wed Nov 19, 2014

]]>The swimming behavior of bacteria and other microorganisms is sensitive to the physical properties of the fluid in which they swim. Mucus, biofilms, and artificial liquid-crystalline solutions are all examples of fluids with some degree of anisotropy that are also commonly encountered by bacteria. I...

[Phys. Rev. E 90, 052503] Published Wed Nov 19, 2014

]]>The identification of the topological structures of complex networks from dynamical information is a significant inverse problem. How to infer the information of network topology from short-time dynamical data is a challenging topic. The presence of synchronization among nodes makes the identificati...

[Phys. Rev. E 90, 052818] Published Wed Nov 19, 2014

]]>We propose and study a dissatisfied adaptive snowdrift game with a payoff parameter r that incorporates a cost for rewiring a connection. An agent, facing adverse local environment, may switch action without a cost or rewire an existing link with a cost a so as to attain a better competing environme...

[Phys. Rev. E 90, 052819] Published Wed Nov 19, 2014

]]>Many work extraction or information erasure processes in the literature involve the raising and lowering of energy levels via external fields. But even if the actual system is treated quantum mechanically, the field is assumed to be classical and of infinite strength, hence not developing any correl...

[Phys. Rev. E 90, 052136] Published Tue Nov 18, 2014

]]>Spectral fluctuations of a system of N weakly interacting bosons in an isotropic harmonic trap are studied, with the focus on the deviations from Poisson spectral statistics, typical of a quantum integrable systems. We have utilized the ideas formulated by Makino et al. [Phys. Rev. E 67, 066205 (200...

[Phys. Rev. E 90, 052137] Published Tue Nov 18, 2014

]]>A lattice model of critical dense polymers O(n) is considered for finite cylinder geometry. Due to the presence of noncontractible loops with a fixed fugacity ξ, the model at n=0 is a generalization of the critical dense polymers solved by Pearce, Rasmussen, and Villani. We found the free energy for...

[Phys. Rev. E 90, 052138] Published Tue Nov 18, 2014

]]>We expand on a recent study of a lattice model of interacting particles [Phys. Rev. Lett. 111, 110601 (2013)PRLTAO10.1103/PhysRevLett.111.110601]. The adsorption isotherm and equilibrium fluctuations in particle number are discussed as a function of the interaction. Their behavior is similar to that...

[Phys. Rev. E 90, 052139] Published Tue Nov 18, 2014

]]>Chromatin remodeling factors are enzymes being able to alter locally chromatin structure at the nucleosomal level and they actively participate in the regulation of gene expression. Using simple rules for individual nucleosome motion induced by a remodeling factor, we designed simulations of the rem...

[Phys. Rev. E 90, 052717] Published Tue Nov 18, 2014

]]>The diffusion processes on complex networks may be described by different Laplacian matrices due to heterogeneous connectivity. Here we investigate the random walks of blind ants and myopic ants on heterogeneous networks: While a myopic ant hops to a neighbor node every step, a blind ant may stay or...

[Phys. Rev. E 90, 052814] Published Tue Nov 18, 2014

]]>We consider a dual model of decision making, in which an individual forms its opinion based on contrasting mechanisms of imitation and rational calculation. The decision-making model (DMM) implements imitating behavior by means of a network of coupled two-state master equations that undergoes a phas...

[Phys. Rev. E 90, 052815] Published Tue Nov 18, 2014

]]>The minority game is a well-known agent-based model with no explicit interaction among its agents. However, it is known that they interact through the global magnitudes of the model and through their strategies. In this work we have attempted to formalize the implicit interactions among minority gam...

[Phys. Rev. E 90, 052816] Published Tue Nov 18, 2014

]]>In this paper we study the interplay between epidemic spreading and risk perception on multiplex networks. The basic idea is that the effective infection probability is affected by the perception of the risk of being infected, which we assume to be related to the fraction of infected neighbors, as i...

[Phys. Rev. E 90, 052817] Published Tue Nov 18, 2014

]]>In this paper we investigate how the complexity of chaotic phase spaces affect the efficiency of importance sampling Monte Carlo simulations. We focus on flat-histogram simulations of the distribution of finite-time Lyapunov exponent in a simple chaotic system and obtain analytically that the comput...

[Phys. Rev. E 90, 052916] Published Tue Nov 18, 2014

]]>We study models with three coupled vector fields characterized by O(N1)⊕O(N2)⊕O(N3) symmetry. Using the nonperturbative functional renormalization group, we derive β functions for the couplings and anomalous dimensions in d dimensions. Specializing to the case of three dimensions, we explore interac...

[Phys. Rev. E 90, 052129] Published Mon Nov 17, 2014

]]>We analyze the dynamics of a two-dimensional system of interacting active dumbbells. We characterize the mean-square displacement, linear response function, and deviation from the equilibrium fluctuation-dissipation theorem as a function of activity strength, packing fraction, and temperature for pa...

[Phys. Rev. E 90, 052130] Published Mon Nov 17, 2014

]]>The observation of quantum coherence in pigment-protein complexes has attracted considerable interest. One such endeavor entails applying a quantum heat engine to model the photosynthetic reaction center, but the definition of work used is inconsistent with that defined in quantum thermodynamics. Us...

[Phys. Rev. E 90, 052131] Published Mon Nov 17, 2014

]]>Understanding and manipulating work fluctuations in microscale and nanoscale systems are of both fundamental and practical interest. For example, aspects of work fluctuations will be an important factor in designing nanoscale heat engines. In this work, an optimal control approach directly exploitin...

[Phys. Rev. E 90, 052132] Published Mon Nov 17, 2014

]]>We consider a quantum system A∪B made up of degrees of freedom that can be partitioned into spatially disjoint regions A and B. When the full system is in a pure state in which regions A and B are entangled, the quantum mechanics of region A described without reference to its complement is tradition...

[Phys. Rev. E 90, 052133] Published Mon Nov 17, 2014

]]>Classical density functional theory (DFT) of fluids is a fast and efficient theory to compute the structure of the electrical double layer in the primitive model of ions where ions are modeled as charged, hard spheres in a background dielectric. While the hard-core repulsive component of this ion-io...

[Phys. Rev. E 90, 052134] Published Mon Nov 17, 2014

]]>This article presents a theoretical prediction of stochastic resonance in spin-crossover materials. The analysis of stochastic resonance phenomenon in a spin-crossover system is performed in the framework of the phenomenological kinetic model with light-induced transition described by dynamical pote...

[Phys. Rev. E 90, 052135] Published Mon Nov 17, 2014

]]>Athermal steady-state plastic flows were simulated for the Kob-Andersen binary Lennard-Jones system and its repulsive version in which the sign of the attractive terms is changed to a plus. Properties evaluated include the distributions of energy drops, stress drops, and strain intervals between the...

[Phys. Rev. E 90, 052304] Published Mon Nov 17, 2014

]]>An elegant simulation method, suitable for investigating the dewetting dynamics of thin and viscous liquid layers, is discussed. The efficiency of the method is exemplified by studying a two-parameter depinninglike model defined on inhomogeneous solid surfaces. The morphology and the statistical pro...

[Phys. Rev. E 90, 052404] Published Mon Nov 17, 2014

]]>The contribution to the free energy of distortion of the ferroelectric smectic-C* due to the electrostatic interaction of polarization charges is calculated. These calculations are performed by accounting for the anisotropy of the permittivity, which is essential for smectic-C*. Fluctuations of the ...

[Phys. Rev. E 90, 052502] Published Mon Nov 17, 2014

]]>We compute the effects of excluded volume on the probability for double-stranded DNA to form a loop. We utilize a Monte Carlo algorithm for generation of large ensembles of self-avoiding wormlike chains, which are used to compute the J factor for varying length scales. In the entropic regime, we con...

[Phys. Rev. E 90, 052602] Published Mon Nov 17, 2014

]]>This paper deals with the control of bias estimation when estimating mutual information from a nonparametric approach. We focus on continuously distributed random data and the estimators we developed are based on a nonparametric k-nearest-neighbor approach for arbitrary metrics. Using a multidimensi...

[Phys. Rev. E 90, 052714] Published Mon Nov 17, 2014

]]>Mechanical deformability of cells is a key property that influences their ability to migrate and their contribution to tissue development and regeneration. We analyze here the possibility of characterizing the overall deformability of cells by their apparent viscosity, using a simplified method to e...

[Phys. Rev. E 90, 052715] Published Mon Nov 17, 2014

]]>Toxic fibrillar aggregates of islet amyloid polypeptide (IAPP) appear as the physical outcome of a peptidic phase transition signaling the onset of type-2 diabetes mellitus in different mammalian species. In particular, experimentally verified mutations on the amyloidogenic segment 20-29 in humans, ...

[Phys. Rev. E 90, 052716] Published Mon Nov 17, 2014

]]>We describe the complex global structure of giant components in directed multiplex networks that generalizes the well-known bow-tie structure, generic for ordinary directed networks. By definition, a directed multiplex network contains vertices of one type and directed edges of m different types. In...

[Phys. Rev. E 90, 052809] Published Mon Nov 17, 2014

]]>Recent empirical studies using large-scale data sets have validated the Granovetter hypothesis on the structure of the society in that there are strongly wired communities connected by weak ties. However, as interaction between individuals takes place in diverse contexts, these communities turn out ...

[Phys. Rev. E 90, 052810] Published Mon Nov 17, 2014

]]>Dynamic social opinion models have been widely studied on undirected networks, and most of them are based on spin interaction models that produce a consensus. In reality, however, many networks such as Twitter and the World Wide Web are directed and are composed of both unidirectional and bidirectio...

[Phys. Rev. E 90, 052811] Published Mon Nov 17, 2014

]]>We study the Krapivsky-Redner (KR) network growth model, but where new nodes can connect to any number of existing nodes, m, picked from a power-law distribution p(m)∼m−α. Each of the m new connections is still carried out as in the KR model with probability redirection r (corresponding to degree ex...

[Phys. Rev. E 90, 052812] Published Mon Nov 17, 2014

]]>Through supervised learning in a binary perceptron one is able to classify an extensive number of random patterns by a proper assignment of binary synaptic weights. However, to find such assignments in practice is quite a nontrivial task. The relation between the weight space structure and the algor...

[Phys. Rev. E 90, 052813] Published Mon Nov 17, 2014

]]>During pattern formation in spatially extended systems, different mechanisms with different characteristic length scales, e.g., reaction-diffusion processes or molecular interactions, can be active. Such multiscale effects may generate new phenomena, which are not observed in systems where pattern f...

[Phys. Rev. E 90, 052913] Published Mon Nov 17, 2014

]]>We analyze a delay differential equation for the amplitude of the electrical field in order to understand recent experimental observations of low-frequency oscillations in a QD laser. The laser contains no saturable absorber section and exhibits no relaxation oscillations. We investigate the problem...

[Phys. Rev. E 90, 052914] Published Mon Nov 17, 2014

]]>We study the long-range electron and energy transfer mediated by solitons in a quasi-one-dimensional molecular chain (conjugated polymer, alpha-helical macromolecule, etc.) weakly bound to a donor and an acceptor. We show that for certain sets of parameter values in such systems an electron, initial...

[Phys. Rev. E 90, 052915] Published Mon Nov 17, 2014

]]>Control of flow around a circular cylinder is studied numerically aiming at minimization of the energy dissipation. First, we derive a mathematical relationship (i.e., identity) between the energy dissipation in an infinitely large volume and the surface quantities, so that the cost function can be ...

[Phys. Rev. E 90, 053008] Published Mon Nov 17, 2014

]]>The gravity-driven instability of a thin liquid film located underneath a soft solid material is considered. The equations and boundary conditions governing the solid deformation are systematically converted from a Lagrangian representation to an Eulerian representation, which is the natural framewo...

[Phys. Rev. E 90, 053009] Published Mon Nov 17, 2014

]]>The wakefield, or ion focus, formed by ions streaming past dust particles trapped in the plasma sheath leads to two types of instabilities: the Schweigert instability in multilayer systems and the mode-coupling instability that already appears in single-layer dust systems. Here, a model is presented...

[Phys. Rev. E 90, 053103] Published Mon Nov 17, 2014

]]>The inhomogeneity of multiplicative white noise leads to various coupling modes between deterministic and stochastic forces. We investigate the phase transition induced by the variation of the coupling mode through manipulating its characteristic parameter continuously. Even when the noise strength ...

[Phys. Rev. E 90, 052121] Published Fri Nov 14, 2014

]]>A method for the study of the ground states of lattice-gas models or equivalent spin models with extended-range interactions is proposed. It is shown that effect of longer-range interactions can be studied in terms of the solution of the ground-state problem for a model with short-range interactions...

[Phys. Rev. E 90, 052123] Published Fri Nov 14, 2014

]]>We show that the main forbidden interval theorems of stochastic resonance hold for a correlation performance measure. Earlier theorems held only for performance measures based on mutual information or the probability of error detection. Forbidden interval theorems ensure that a threshold signal dete...

[Phys. Rev. E 90, 052124] Published Fri Nov 14, 2014

]]>A general achievable upper bound of extractable work under feedback control is given, where nonequilibrium equalities are generalized so as to be applicable to error-free measurements. The upper bound involves a term which arises from the part of the process whose information becomes unavailable and...

[Phys. Rev. E 90, 052125] Published Fri Nov 14, 2014

]]>We discuss the non-self-averaging phenomena in the critical point of weakly disordered Ising ferromagnet. In terms of the renormalized replica Ginzburg-Landau Hamiltonian in dimensions D<4, we derive an explicit expression for the probability distribution function (PDF) of the critical free-energ...

[Phys. Rev. E 90, 052126] Published Fri Nov 14, 2014

]]>This work studies the statistical mechanical properties of a small gaseous system in a constant external field. The authors find that in the microcanonical ensemble the presence of the applied field gives rise to intrinsic equilibrium inhomogeneities, such as a variation in the local kinetic temperature along the field. This effect, as expected, vanishes in the thermodynamic limit.

[Phys. Rev. E 90, 052127] Published Fri Nov 14, 2014

]]>We consider simple systems driven multiplicatively by white shot noise, which appear in the modeling of the dynamics of soil nutrients and contaminants. The dynamics of these systems is analyzed in two ways: solving a hierarchy of linear ordinary differential equations for the moments, which gives a...

[Phys. Rev. E 90, 052128] Published Fri Nov 14, 2014

]]>The rheological behavior of a dilute suspension of vesicles in linear shear flow at a finite concentration is analytically examined. In the quasispherical limit, two coupled nonlinear equations that describe the vesicle orientation in the flow and its shape evolution were derived [Phys. Rev. Lett. 9...

[Phys. Rev. E 90, 052302] Published Fri Nov 14, 2014

]]>We present a crowding-based model to predict the shear viscosity of suspensions of rigid bimodal-sized particles. In this model, the mutual crowding factor is defined to explicitly account for the change in the amount of fluid trapped in the interstices formed by particles upon mixing particles with...

[Phys. Rev. E 90, 052303] Published Fri Nov 14, 2014

]]>Helmholtz free energies of the dominant binary crystalline solids found in the Cu-Zr system at high temperatures close to the melting curve are calculated. Our theoretical approach combines fundamental measure density functional theory (applied to the hard-sphere reference system) and a perturbative...

[Phys. Rev. E 90, 052403] Published Fri Nov 14, 2014

]]>An atomic force microscope was used to scribe a polyimide-coated substrate with complex patterns that serve as an alignment template for a nematic liquid crystal. By employing a sufficiently large density of scribe lines, two-dimensional topological defect arrays of arbitrary defect strength were pa...

[Phys. Rev. E 90, 052501] Published Fri Nov 14, 2014

]]>The activation of a K+ channel sensor in two sequential stages during a voltage clamp may be described as the translocation of a Brownian particle in an energy landscape with two large barriers between states. A solution of the Smoluchowski equation for a square-well approximation to the potential f...

[Phys. Rev. E 90, 052713] Published Fri Nov 14, 2014

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