The lattice gas model of condensation in a heterogeneous pore system, represented by a random graph of cells, is studied using an exact analytical solution. A binary mixture of pore cells with different coordination numbers is shown to exhibit two phase transitions as a function of chemical potentia...

[Phys. Rev. E 90, 012144] Published Thu Jul 31, 2014

]]>We study the performance of a quantum Otto cycle operating in trapping potentials of different shapes. We show that, while both the mean work output and the efficiency of two Otto cycles in different trapping potentials can be made equal, the work probability distribution will still be strongly affe...

[Phys. Rev. E 90, 012145] Published Thu Jul 31, 2014

]]>We derive the analytical expression for the first finite-size correction to the average free energy of disordered Ising models on random regular graphs. The formula can be physically interpreted as a weighted sum over all non-self-intersecting loops in the graph, the weight being the free-energy sh...

[Phys. Rev. E 90, 012146] Published Thu Jul 31, 2014

]]>As recently proposed, the long-time behavior of equilibrium time-correlation functions for one-dimensional systems are expected to be captured by a nonlinear extension of fluctuating hydrodynamics. We outline the predictions from the theory aimed at the comparison with molecular dynamics. We report ...

[Phys. Rev. E 90, 012147] Published Thu Jul 31, 2014

]]>We study the transfer of heat in the nonequilibrium spin-boson model with an Ohmic dissipation. In the nonadiabatic limit we derive a formula for the thermal conductance based on a rate equation formalism at the level of the noninteracting blip approximation, valid for temperatures T>TK, with TK ...

[Phys. Rev. E 90, 012148] Published Thu Jul 31, 2014

]]>Recently the analysis of scattering patterns by angular cross-correlation analysis (CCA) was introduced to reveal the orientational order in disordered samples with special focus to future applications on x-ray free-electron laser facilities. We apply this CCA approach to ultra-small-angle light-sca...

[Phys. Rev. E 90, 012309] Published Thu Jul 31, 2014

]]>In this work we propose a mechanism to explain the enhancement of the magnetic-field-induced yield stress when nonmagnetic particles are added to magnetic particulate suspensions, i.e., two-component suspensions. Our main hypothesis is that the nonmagnetic particles collide with the field-induced ma...

[Phys. Rev. E 90, 012310] Published Thu Jul 31, 2014

]]>We perform a systematic study of the characteristics of shear transformation zones (STZs) that nucleate at free surfaces of two-dimensional amorphous solids subject to tensile loading using two different atomistic simulation methods, the standard athermal, quasistatic (AQ) approach and our recently ...

[Phys. Rev. E 90, 012311] Published Thu Jul 31, 2014

]]>We analyze the combined effect of three ingredients of an aggregation model—surface tension, particle flow and particle source—representing typical characteristics of many aggregation growth processes in nature. Through extensive numerical experiments and for different underlying lattice structures ...

[Phys. Rev. E 90, 012312] Published Thu Jul 31, 2014

]]>This article deals with the theoretical prediction of the wetting hysteresis on nonideal solid surfaces in terms of the surface heterogeneity parameters. The spatially periodical chemical heterogeneity is considered. We propose precise definitions for both the advancing and the receding contact angl...

[Phys. Rev. E 90, 012406] Published Thu Jul 31, 2014

]]>We use conformal maps to study a free boundary problem for a two-fluid electromechanical system, where the interface between the fluids is determined by the combined effects of electrostatic forces, gravity, and surface tension. The free boundary in our system develops sharp corners or singularities...

[Phys. Rev. E 90, 012407] Published Thu Jul 31, 2014

]]>The strength of quasibrittle materials depends on the ensemble of defects inside the sample and on the way damage accumulates before failure. Using large-scale numerical simulations of the random fuse model, we investigate the evolution of the microcrack distribution as the applied load approaches t...

[Phys. Rev. E 90, 012408] Published Thu Jul 31, 2014

]]>A lubrication model is used to study dewetting of an evaporating thin film layer over a solid substrate with a nanometer-scale topography. The effects of the geometry of the topography, the contact angle, the film thickness, and the slippage on the dewetting have been studied. Our results reveal tha...

[Phys. Rev. E 90, 012409] Published Thu Jul 31, 2014

]]>Development of soft electromechanical materials is critical for several tantalizing applications such as soft robots and stretchable electronics, among others. Soft nonpiezoelectric materials can be coaxed to behave like piezoelectrics by merely embedding charges and dipoles in their interior and as...

[Phys. Rev. E 90, 012603] Published Thu Jul 31, 2014

]]>The temporal statistics exhibited by written correspondence appear to be media dependent, with features which have so far proven difficult to characterize. We explain the origin of these difficulties by disentangling the role of spontaneous activity from decision-based prioritizing processes in huma...

[Phys. Rev. E 90, 012817] Published Thu Jul 31, 2014

]]>The linear regression parameters between two time series can be different under different lengths of observation period. If we study the whole period by the sliding window of a short period, the change of the linear regression parameters is a process of dynamic transmission over time. We tackle fund...

[Phys. Rev. E 90, 012818] Published Thu Jul 31, 2014

]]>Colloidal particles can achieve autonomous motion by a number of physicochemical mechanisms. For instance, if a spherical particle acts as a catalyst with an asymmetric surface reactivity, a molecular solute concentration gradient will develop in the surrounding fluid that can propel the particle vi...

[Phys. Rev. E 90, 013030] Published Thu Jul 31, 2014

]]>A direct numerical simulation of the three-dimensional elektrokinetic instability near a charge-selective surface (electric membrane, electrode, or system of micro- or nanochannels) has been carried out and analyzed. A special finite-difference method has been used for the space discretization along...

[Phys. Rev. E 90, 013031] Published Thu Jul 31, 2014

]]>In the present work fluid flow and solute transport through porous media are described by solving the governing equations at the pore scale with finite-volume discretization. Instead of solving the simplified Stokes equation (very often employed in this context) the full Navier-Stokes equation is us...

[Phys. Rev. E 90, 013032] Published Thu Jul 31, 2014

]]>Small number dust particle clusters can be used as probes for plasma diagnostics. The number of dust particles as well as cluster size and shape can be easily controlled employing a glass box placed within a Gaseous Electronics Conference (GEC) rf reference chamber to provide confinement of the dust...

[Phys. Rev. E 90, 013107] Published Thu Jul 31, 2014

]]>The properties of self-similar optical waves propagating in a tapered cubic-quintic nonlinear waveguide are investigated. Using a lens-type transformation we obtain the exact analytical self-similar solutions which describe the propagation of bright-shaped solitons, dark-shaped solitons, kink-shaped...

[Phys. Rev. E 90, 013202] Published Thu Jul 31, 2014

]]>The lattice Boltzmann (LB) method typically uses an isothermal equation of state. This is not sufficient to simulate a number of acoustic phenomena where the equation of state cannot be approximated as linear and constant. However, it is possible to implement variable equations of state by altering ...

[Phys. Rev. E 90, 013310] Published Thu Jul 31, 2014

]]>[Phys. Rev. E 90, 019906] Published Thu Jul 31, 2014

]]>Using a formalism based on the spectral decomposition of the replicated transfer matrix for disordered Ising models, we obtain several results that apply both to isolated one-dimensional systems and to locally treelike graph and factor graph (p-spin) ensembles. We present exact analytical expression...

[Phys. Rev. E 90, 012140] Published Wed Jul 30, 2014

]]>Relativistic effect is important in many quantum systems but theoretically complicated from both fundamental and practical perspectives. Herein we introduce an efficient computational procedure to predict the structure and energetic properties of relativistic quantum systems by mapping the Pauli pri...

[Phys. Rev. E 90, 012141] Published Wed Jul 30, 2014

]]>Computer simulations of the Ising model exhibit white noise if thermal fluctuations are governed by Boltzmann's factor alone; whereas we find that the same model exhibits 1/f noise if Boltzmann's factor is extended to include local alignment entropy to all orders. We show that this nonlinear correct...

[Phys. Rev. E 90, 012142] Published Wed Jul 30, 2014

]]>Condensation of fluctuations is an interesting phenomenon conceptually distinct from condensation on average. One striking feature is that, contrary to what happens on average, condensation of fluctuations may occur even in the absence of interaction. The explanation emerges from the duality between...

[Phys. Rev. E 90, 012143] Published Wed Jul 30, 2014

]]>Neural field theory insights are used to derive effective brain connectivity matrices from the functional connectivity matrix defined by activity covariances. The symmetric case is exactly solved for a resting state system driven by white noise, in which strengths of connections, often termed effect...

[Phys. Rev. E 90, 012707] Published Wed Jul 30, 2014

]]>The ability to understand the impact of adversarial processes on networks is crucial to various disciplines. The objects of study in this article are fitness-driven networks. Fitness-dependent networks are fully described by a probability distribution of fitness and an attachment kernel. Every node ...

[Phys. Rev. E 90, 012815] Published Wed Jul 30, 2014

]]>We explore the networks that yield the largest mean consensus time of voter models under different update rules. By analytical and numerical means, we show that the so-called lollipop graph, barbell graph, and double-star graph maximize the mean consensus time under the update rules called the link ...

[Phys. Rev. E 90, 012816] Published Wed Jul 30, 2014

]]>We study numerically joint mixing of salt and colloids by chaotic advection and how salt inhomogeneities accelerate or delay colloid mixing by inducing a velocity drift Vdp between colloids and fluid particles as proposed in recent experiments [J. Deseigne et al., Soft Matter 10, 4795 (2014)10.1039/...

[Phys. Rev. E 90, 013027] Published Wed Jul 30, 2014

]]>Immiscible displacement of viscous oil by water in a petroleum reservoir is often hydrodynamically unstable. Due to similarities between the physics of dielectric breakdown and immiscible flow in porous media, we extend the existing dielectric breakdown model to simulate viscous fingering patterns f...

[Phys. Rev. E 90, 013028] Published Wed Jul 30, 2014

]]>The object of experimental study is a fluid flow generated by differential rotation of a free light spherical body in a rotating cylindrical cavity. The body stays near the axis under the action of centrifugal force. The body rotation is generated by a force field oscillating in the cavity reference...

[Phys. Rev. E 90, 013029] Published Wed Jul 30, 2014

]]>The kinetic Monte Carlo method is used to model the dynamic properties of proton diffusion in anhydrous proton conductors. The results have been discussed with reference to a two-step process called the Grotthuss mechanism. There is a widespread belief that this mechanism is responsible for fast pro...

[Phys. Rev. E 90, 012135] Published Tue Jul 29, 2014

]]>The authors examine a number of two- and three-dimensional tiling models that, if cooled slowly, undergo an infinite sequence of phase transitions at which sublattices of increasing size crystallize. This cooling process can lead to an ordered nonperiodic state at zero temperature that is not necessarily the ground state of the system.

[Phys. Rev. E 90, 012136] Published Tue Jul 29, 2014

]]>In this paper we study the four-point correlation function χ4 of collective density fluctuations in a nonequilibrium liquid. The equilibration is controlled by a modified stretched exponential behavior {exp[−(tw/τ)β]} having the relaxation time τ dependent on the aging time tw. Similar aging behavio...

[Phys. Rev. E 90, 012137] Published Tue Jul 29, 2014

]]>The spatial suppression of order parameter fluctuations in a critical media produces critical Casimir forces acting on confining surfaces. This scenario is realized in a critical binary mixture near the demixing transition point that corresponds to the second-order phase transition of the Ising univ...

[Phys. Rev. E 90, 012138] Published Tue Jul 29, 2014

]]>We investigate the nonequilibrium phase transition of the disordered contact process in five space dimensions by means of optimal fluctuation theory and Monte Carlo simulations. We find that the critical behavior is of mean-field type, i.e., identical to that of the clean five-dimensional contact pr...

[Phys. Rev. E 90, 012139] Published Tue Jul 29, 2014

]]>We evidence a Kovacs-like memory effect in a uniformly driven granular gas. A system of inelastic hard particles, in the low density limit, can reach a nonequilibrium steady state when properly forced. By following a certain protocol for the drive time dependence, we prepare the gas in a state where...

[Phys. Rev. E 90, 012204] Published Tue Jul 29, 2014

]]>System-environment interactions are intrinsically nonlinear and dependent on the interplay between many degrees of freedom. The complexity may be even more pronounced when one aims to describe biologically motivated systems. In that case, it is useful to resort to simplified models relying on effect...

[Phys. Rev. E 90, 012813] Published Tue Jul 29, 2014

]]>To understand the effects of nonidentical processing elements (PEs) on parallel discrete-event simulation (PDES) schemes, two stochastic growth models, the restricted solid-on-solid (RSOS) model and the Family model, are investigated by simulations. The RSOS model is the model for the PDES scheme go...

[Phys. Rev. E 90, 012814] Published Tue Jul 29, 2014

]]>Excitation of shape instabilities represents one route to bubble death in single-bubble sonoluminescence. This feature is satisfactorily explained by an expansion to first order in the amplitude of a shape distortion in the form of a spherical harmonic. By taking the expansion to second order, it is...

[Phys. Rev. E 90, 013026] Published Tue Jul 29, 2014

]]>Neural field models are used to study macroscopic spatiotemporal patterns in the cortex. Their derivation from networks of model neurons normally involves a number of assumptions, which may not be correct. Here we present an exact derivation of a neural field model from an infinite network of theta ...

[Phys. Rev. E 90, 010901] Published Mon Jul 28, 2014

]]>In order to elucidate the nature of hysteresis characteristics in a magnetic Ising-type thin film with a certain thickness, such as types of frequency dispersion curves, decay of hysteresis loop area, corresponding coercive field and remanent magnetization values, etc., we investigate the hysteretic...

[Phys. Rev. E 90, 012129] Published Mon Jul 28, 2014

]]>We consider the problem of two-point resistance in an (m−1)×n resistor network embedded on a globe, a geometry topologically equivalent to an m×n cobweb with its boundary collapsed into one single point. We deduce a concise formula for the resistance between any two nodes on the globe using a method...

[Phys. Rev. E 90, 012130] Published Mon Jul 28, 2014

]]>The transport properties of active Brownian particles driven by cross-correlated noises are investigated. Using the Langevin and Fokker-Planck approaches, the theoretical analysis of the model is presented. It is found that correlated noises can produce a net velocity, which stems from the symmetric...

[Phys. Rev. E 90, 012131] Published Mon Jul 28, 2014

]]>The mean-field (MF) approximation offers a simple, fast way to infer direct interactions between elements in a network of correlated variables, a common, computationally challenging problem with practical applications in fields ranging from physics and biology to the social sciences. However, MF met...

[Phys. Rev. E 90, 012132] Published Mon Jul 28, 2014

]]>In an exclusion process with avalanches, when a particle hops to a neighboring empty site which is adjacent to an island the particle on the other end of the island immediately hops, and if it joins another island this triggers another hop. There are no restrictions on the length of the islands and ...

[Phys. Rev. E 90, 012133] Published Mon Jul 28, 2014

]]>We study the stochastic behavior of heterogeneous diffusion processes with the power-law dependence D(x)∼|x|α of the generalized diffusion coefficient encompassing sub- and superdiffusive anomalous diffusion. Based on statistical measures such as the amplitude scatter of the time-averaged mean-squar...

[Phys. Rev. E 90, 012134] Published Mon Jul 28, 2014

]]>For the last 50 years, the flow of a granular material through an aperture has been intensely studied in gravity-driven vertical systems (e.g., silos and hoppers). Nevertheless, in many industrial applications, grains are horizontally transported at constant velocity, lying on conveyor belts or floa...

[Phys. Rev. E 90, 012203] Published Mon Jul 28, 2014

]]>In this paper, an imaging mode (called the adaptive multiloop mode) of atomic force microscope (AFM) is proposed to substantially increase the speed of tapping mode (TM) imaging while preserving the advantages of TM imaging over contact mode (CM) imaging. Due to its superior image quality and less s...

[Phys. Rev. E 90, 012405] Published Mon Jul 28, 2014

]]>The structure of a network dramatically affects the spreading phenomena unfolding upon it. The contact distribution of the nodes has long been recognized as the key ingredient in influencing the outbreak events. However, limited knowledge is currently available on the role of the weight of the edges...

[Phys. Rev. E 90, 012812] Published Mon Jul 28, 2014

]]>In this study, symbolic dynamics is used to research the error of chaos synchronization via noisy channels. The theory of symbolic dynamics reduces chaos to a shift map that acts on a discrete set of symbols, each of which contains information about the system state. Using this transformation, a cod...

[Phys. Rev. E 90, 012908] Published Mon Jul 28, 2014

]]>How to freely enhance or suppress synchronization of networked dynamical systems is of great importance in many disciplines. A unified precise control method for a synchronization-desynchronization switch, called the pull-push control method, is suggested. Namely, synchronization can be achieved whe...

[Phys. Rev. E 90, 012909] Published Mon Jul 28, 2014

]]>We study numerically liquid-vapor phase separation in two-dimensional, nonisothermal, van der Waals (vdW) liquid drops using the method of smoothed particle hydrodynamics (SPH). In contrast to previous SPH simulations of drop formation, our approach is fully adaptive and follows the diffuse-interfac...

[Phys. Rev. E 90, 013021] Published Mon Jul 28, 2014

]]>It was shown by Oberlack and Rosteck [Discr. Cont. Dyn. Sys. S, 3, 451 201010.3934/dcdss.2010.3.451] that the infinite set of multipoint correlation (MPC) equations of turbulence admits a considerable extended set of Lie point symmetries compared to the Galilean group, which is implied by the origin...

[Phys. Rev. E 90, 013022] Published Mon Jul 28, 2014

]]>Accurate models for the water vapor flux at a water-air interface are required in various scientific, reliability and civil engineering aspects. Here, a study of humidity distribution in a container with air and freely exposed water is presented. A model predicting a spatial distribution and time ev...

[Phys. Rev. E 90, 013023] Published Mon Jul 28, 2014

]]>We show that the Casimir effect can emerge in microswimmer suspensions. In principle, two effects conspire against the development of Casimir effects in swimmer suspensions. First, at low Reynolds number, the force on any closed volume vanishes, but here the relevant effect is the drag by the flow p...

[Phys. Rev. E 90, 013024] Published Mon Jul 28, 2014

]]>Using a combined experimental-numerical approach, we study the first-passage time distributions (FPTD) of small particles in two-dimensional porous materials. The distributions in low-porosity structures show persistent long-time tails, which are independent of the Péclet number and therefore cannot...

[Phys. Rev. E 90, 013025] Published Mon Jul 28, 2014

]]>Stochastic transport of a two-dimensional (2D) dusty plasma liquid with a perpendicular magnetic field is studied. Superdiffusion is found to occur especially at higher magnetic fields with β of order unity. Here, β=ωc/ωpd is the ratio of the cyclotron and plasma frequencies for dust particles. The ...

[Phys. Rev. E 90, 013105] Published Mon Jul 28, 2014

]]>Using the self-excited dust acoustic wave as a platform, we demonstrate experimental observation of self-excited fluctuating acoustic vortex pairs with ±1 topological charges through spontaneous waveform undulation in defect-mediated turbulence for three-dimensional traveling nonlinear longitudinal ...

[Phys. Rev. E 90, 013106] Published Mon Jul 28, 2014

]]>In this paper, two modified lattice Boltzmann Bhatnagar-Gross-Krook (LBGK) models for incompressible Navier-Stokes equations and convection-diffusion equations are proposed via the addition of correction terms in the evolution equations. Utilizing this modification, the value of the dimensionless re...

[Phys. Rev. E 90, 013309] Published Mon Jul 28, 2014

]]>Recently, a maximum pseudolikelihood (MPL) inference method has been successfully applied to statistical physics models with intractable likelihoods. We use information theory to derive a relation between the pseudolikelihood and likelihood functions. Furthermore, we show the consistency of the pseu...

[Phys. Rev. E 90, 010101] Published Fri Jul 25, 2014

]]>We present a method which uses Feynman-like diagrams to calculate the statistical quantities of embedded many-body random matrix problems. The method provides a promising alternative to existing techniques and offers many important simplifications. We use it here to find the fourth, sixth, and eight...

[Phys. Rev. E 90, 010102] Published Fri Jul 25, 2014

]]>Hydrodynamic instabilities are a major obstacle in the quest to achieve ignition as they cause preexisting capsule defects to grow and ultimately quench the fusion burn in experiments at the National Ignition Facility. Unstable growth at the ablation front has been dramatically reduced in implosions...

[Phys. Rev. E 90, 011102] Published Fri Jul 25, 2014

]]>Passive states of quantum systems are states from which no system energy can be extracted by any cyclic (unitary) process. Gibbs states of all temperatures are passive. Strong local (SL) passive states are defined to allow any general quantum operation, but the operation is required to be local, bei...

[Phys. Rev. E 90, 012127] Published Fri Jul 25, 2014

]]>The interfacial tension between coexisting phases is a fundamental quantity, but its computation by computer simulations remains a challenging problem. The authors analyze the origins of finite-size effects in such computations, tracing one of the corrections to a “domain breathing” mechanism where order parameter fluctuations in the bulk and the motion of the interface are correlated.

[Phys. Rev. E 90, 012128] Published Fri Jul 25, 2014

]]>We propose an integral equation theory for a mixture of macroions, counterions, and co-ions in a waterlike fluid in which all the components are accounted for explicitly. The macroions can carry positive and negative surface charges simultaneously, mimicking in this way the situation occurring in pr...

[Phys. Rev. E 90, 012308] Published Fri Jul 25, 2014

]]>Self-healing of polymer films often takes place as the molecules diffuse across a damaged region, above their melting temperature. Using molecular dynamics simulations we probe the healing of polymer films and compare the results with those obtained for thermal welding of homopolymer slabs. These tw...

[Phys. Rev. E 90, 012602] Published Fri Jul 25, 2014

]]>A persistent alternation in the cardiac action potential duration has been linked to the onset of ventricular arrhythmia, which may lead to sudden cardiac death. A coupling between these cardiac alternans and the intracellular calcium dynamics has also been identified in previous studies. In this pa...

[Phys. Rev. E 90, 012706] Published Fri Jul 25, 2014

]]>We introduce a quantum Monte Carlo algorithm to measure the Rényi entanglement entropies in systems of interacting bosons in the continuum. This approach is based on a path-integral ground state method that can be applied to interacting itinerant bosons in any spatial dimension with direct relevance...

[Phys. Rev. E 90, 013308] Published Fri Jul 25, 2014

]]>We construct a structural order parameter from the energy equipartition of normal modes of vibration to quantify the structural heterogeneity in disordered solids. The order parameter exhibits strong spatial correlations with low-temperature dynamics and local structural entropy. To characterize the...

[Phys. Rev. E 90, 010401] Published Thu Jul 24, 2014

]]>We examine the average-case performance of a code-division multiple-access (CDMA) multiuser demodulator in which quantum fluctuations are utilized to demodulate the original message within the context of Bayesian inference. The quantum fluctuations are built into the system as a transverse field in ...

[Phys. Rev. E 90, 012126] Published Thu Jul 24, 2014

]]>We report numerical results which show the achievement of net transport of self-propelled particles (SPPs) in the presence of a two-dimensional regular array of convex, either symmetric or asymmetric, rigid obstacles. The repulsive interparticle (soft disks) and particle-obstacle interactions presen...

[Phys. Rev. E 90, 012307] Published Thu Jul 24, 2014

]]>We demonstrate distinct entanglement of single-walled carbon nanotube (SWCNT) and multiwalled carbon nanotube (MWCNT) clusters in nematic liquid crystal medium using scanning electron microscopy technique and the entanglement influence on electric field-induced stretching phenomena of the said clust...

[Phys. Rev. E 90, 012508] Published Thu Jul 24, 2014

]]>In this paper, we study the dynamics of freely falling plates based on the Kirchhoff equation and the quasisteady aerodynamic model. Motion transitions among fluttering, tumbling along a cusp-like trajectory, irregular, and tumbling along a straight trajectory are obtained by solving the dynamical e...

[Phys. Rev. E 90, 013020] Published Thu Jul 24, 2014

]]>Recent work has developed a nonlinear hydrodynamic fluctuation theory for a chain of coupled anharmonic oscillators governing the conserved fields, namely, stretch, momentum, and energy. The linear theory yields two propagating sound modes and one diffusing heat mode, all three with diffusive broade...

[Phys. Rev. E 90, 012124] Published Wed Jul 23, 2014

]]>We have applied both the master equation method and harmonic transition state theory to interpret the velocity-dependent friction behavior observed in atomic friction experiments. To understand the discrepancy between attempt frequencies measured in atomic force microscopy experiments and those esti...

[Phys. Rev. E 90, 012125] Published Wed Jul 23, 2014

]]>We study boundary lubrication characteristics of a liquid crystal (LC) monolayer sheared between two crystalline surfaces by nonequilibrium molecular dynamics simulations, using a simplified rigid bead-necklace model of the LC molecules. We consider LC monolayers confined by surfaces with three diff...

[Phys. Rev. E 90, 012404] Published Wed Jul 23, 2014

]]>Recent years have witnessed the development of a large body of algorithms for community detection in complex networks. Most of them are based upon the optimization of objective functions, among which modularity is the most common, though a number of alternatives have been suggested in the scientific...

[Phys. Rev. E 90, 012811] Published Wed Jul 23, 2014

]]>The effect of various velocity boundary condition is studied in two-dimensional Rayleigh-Bénard convection. Combinations of no-slip, stress-free, and periodic boundary conditions are used on both the sidewalls and the horizontal plates. For the studied Rayleigh numbers Ra between 108 and 1011 the he...

[Phys. Rev. E 90, 013017] Published Wed Jul 23, 2014

]]>We present a detailed direct numerical simulation of statistically steady, homogeneous, isotropic, two-dimensional magnetohydrodynamic turbulence. Our study concentrates on the inverse cascade of the magnetic vector potential. We examine the dependence of the statistical properties of such turbulenc...

[Phys. Rev. E 90, 013018] Published Wed Jul 23, 2014

]]>We numerically examine run-and-tumble active matter particles in Casimir geometries composed of two finite parallel walls. We find that there is an attractive force between the two walls of a magnitude that increases with increasing run length. The attraction exhibits an unusual exponential dependen...

[Phys. Rev. E 90, 013019] Published Wed Jul 23, 2014

]]>We study the k-NN hard-core lattice gas model in which the first k next-nearest-neighbor sites of a particle are excluded from occupation by other particles on a two-dimensional square lattice. This model is the lattice version of the hard-disk system with increasing k corresponding to decreasing la...

[Phys. Rev. E 90, 012120] Published Tue Jul 22, 2014

]]>Considering any Hamiltonian, any initial state, and measurements with a small number of possible outcomes compared to the dimension, we show that most measurements are already equilibrated. To investigate nontrivial equilibration, we therefore consider a restricted set of measurements. When the init...

[Phys. Rev. E 90, 012121] Published Tue Jul 22, 2014

]]>Order-disorder phase transition of the ferromagnetic Ising model is investigated on a series of two-dimensional lattices that have negative Gaussian curvatures. Exceptional lattice sites of coordination number seven are distributed on the triangular lattice, where the typical distance between the ne...

[Phys. Rev. E 90, 012122] Published Tue Jul 22, 2014

]]>The temporal evolution of equilibrium fluctuations for surface steps of monatomic height is analyzed studying one-dimensional solid-on-solid models. Using Monte Carlo simulations, fluctuations due to periphery diffusion (PD) as well as due to evaporation and condensation are considered, both for iso...

[Phys. Rev. E 90, 012123] Published Tue Jul 22, 2014

]]>We study the dynamics of inertial particles in three-dimensional incompressible maps, as representations of volume-preserving flows. The impurity dynamics has been modeled, in the Lagrangian framework, by a six-dimensional dissipative bailout embedding map. The fluid-parcel dynamics of the base map ...

[Phys. Rev. E 90, 012906] Published Tue Jul 22, 2014

]]>An alternative way for the derivation of the new Korteweg–de Vries (KdV)-type equation is presented. The equation contains terms depending on the bottom topography (there are six new terms in all, three of which are caused by the unevenness of the bottom). It is obtained in the second-order perturba...

[Phys. Rev. E 90, 012907] Published Tue Jul 22, 2014

]]>Recently, anomalous scaling properties of front broadening during spontaneous imbibition of water in Vycor glass, a nanoporous medium, were reported: the mean height and the width of the propagating front increase with time t both proportional to t1/2. Here, we propose a simple lattice imbibition mo...

[Phys. Rev. E 90, 013016] Published Tue Jul 22, 2014

]]>The mechanical response of a circularly driven disk in a dissipative medium is considered. We focus on the role played by viscous friction in the spinning motion of the disk, especially on the effect called reverse rotation, where the intrinsic and orbital rotations are antiparallel. Contrary to wha...

[Phys. Rev. E 90, 013201] Published Tue Jul 22, 2014

]]>Kinetic and fluid equations are derived for the dynamics of classical inhomogeneous trapped plasmas in the strong coupling regime. The starting point is an extended Singwi-Tosi-Land-Sjölander (STLS) ansatz for the dynamic correlation function, which is allowed to depend on time and both particle coo...

[Phys. Rev. E 90, 011101] Published Mon Jul 21, 2014

]]>Mathematical tools from physics are enabling new ways to study a classic optimization problem.

[Phys. Rev. E 90, 012118] Published Mon Jul 21, 2014

]]>In this article we use optimal control to maximize the efficiency of a quantum heat engine executing the Otto cycle in the presence of external noise. We optimize the engine performance for both amplitude and phase noise. In the case of phase damping we additionally show that the ideal performance o...

[Phys. Rev. E 90, 012119] Published Mon Jul 21, 2014

]]>We present a detailed analysis of the morphology of granular systems composed of frictionless pentagonal particles by varying systematically both the size span and particle shape irregularity, which represent two polydispersity parameters of the system. The microstructure is characterized in terms o...

[Phys. Rev. E 90, 012202] Published Mon Jul 21, 2014

]]>Leukocytes and other circulating cells deform and move relatively to the channel flow in the lateral and translational directions. Their migratory property is important in immune response, hemostasis, cancer progression, delivery of nutrients, and microfluidic technologies such as cell separation an...

[Phys. Rev. E 90, 012705] Published Mon Jul 21, 2014

]]>We consider a model for the diffusion of epidemics in a population that is partitioned into local communities. In particular, assuming a mean-field approximation, we analyze a continuous-time susceptible-infected-susceptible (SIS) model that has appeared recently in the literature. The probability b...

[Phys. Rev. E 90, 012810] Published Mon Jul 21, 2014

]]>We investigate numerically the dynamics of a propagating front in the presence of a spatiotemporally chaotic flow field. The flow field is the three-dimensional time-dependent state of spiral defect chaos generated by Rayleigh-Bénard convection in a spatially extended domain. Using large-scale paral...

[Phys. Rev. E 90, 012905] Published Mon Jul 21, 2014

]]>In the Leidenfrost effect a small drop of fluid is levitated, above a sufficiently hot surface, on a persistent vapor layer generated by evaporation from the drop. The vapor layer thermally insulates the drop from the surface leading to extraordinarily long drop lifetimes. The top-view shape of the ...

[Phys. Rev. E 90, 013014] Published Mon Jul 21, 2014

]]>We analyze both theoretically and experimentally the dynamical behavior of an isothermal axisymmetric liquid bridge close to the minimum-volume stability limit. First, the nature of this stability limit is investigated experimentally by determining the liquid bridge response to a mass force pulse fo...

[Phys. Rev. E 90, 013015] Published Mon Jul 21, 2014

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