We theoretically study energy pumping processes in an electrical circuit with avalanche diodes, where non-Gaussian athermal noise plays a crucial role. We show that a positive amount of energy (work) can be extracted by an external manipulation of the circuit in a cyclic way, even when the system is...

[Phys. Rev. E 90, 012115] Published Fri Jul 18, 2014

]]>We derive the Fokker-Planck equation for multivariable Langevin equations with cross-correlated Gaussian white noises for an arbitrary interpretation of the stochastic differential equation. We formulate the conditions when the solution of the Fokker-Planck equation does not depend on which stochast...

[Phys. Rev. E 90, 012116] Published Fri Jul 18, 2014

]]>We investigate the onset of the discontinuous percolation transition in small-world hyperbolic networks by studying the systems-size scaling of the typical largest cluster approaching the transition, p↗pc. To this end, we determine the average size of the largest cluster 〈smax〉∼NΨ(p) in the thermody...

[Phys. Rev. E 90, 012117] Published Fri Jul 18, 2014

]]>Pair potentials that are bounded at the origin provide an accurate description of the effective interaction for many systems of dissolved soft macromolecules (e.g., flexible dendrimers). Using numerical free-energy calculations, we reconstruct the equilibrium phase diagram of a system of particles i...

[Phys. Rev. E 90, 012305] Published Fri Jul 18, 2014

]]>Agglomeration processes occur in many different realms of science, such as colloid and aerosol formation or formation of bacterial colonies. We study the influence of primary-particle density in agglomerate structures using diffusion-controlled Monte Carlo simulations with realistic space scales thr...

[Phys. Rev. E 90, 012306] Published Fri Jul 18, 2014

]]>The existence, stability properties, and bifurcation diagram of the nematic umbilical defects is studied. Close to the Fréedericksz transition of nematic liquid crystals with negative anisotropic dielectric constant and homeotropic anchoring, an anisotropic Ginzburg-Landau equation for the amplitude...

[Phys. Rev. E 90, 012507] Published Fri Jul 18, 2014

]]>The interfacial pattern formation problem in an injection-driven radial Hele-Shaw flow is studied for the situation in which a Newtonian fluid of negligible viscosity displaces a viscous non-Newtonian power-law fluid. By utilizing a Darcy-law-like formulation, we tackle the fluid-fluid interface evo...

[Phys. Rev. E 90, 013013] Published Fri Jul 18, 2014

]]>We develop a semirelativistic quantum fluid theory based on the expansion of the Dirac Hamiltonian to second order in 1/c. By making use of the Madelung representation of the wave function, we derive a set of hydrodynamic equations that comprises a continuity equation, an Euler equation for the mean...

[Phys. Rev. E 90, 013103] Published Fri Jul 18, 2014

]]>We investigate subpicosecond dynamics of warm dense hydrogen at the XUV free-electron laser facility (FLASH) at DESY (Hamburg). Ultrafast impulsive electron heating is initiated by a ≤300-fs short x-ray burst of 92-eV photon energy. A second pulse probes the sample via x-ray scattering at jitter-fre...

[Phys. Rev. E 90, 013104] Published Fri Jul 18, 2014

]]>Generalized Bloch wave functions of bulk structures, which are composed of not only propagating waves but also decaying and growing evanescent waves, are known to be essential for defining the open boundary conditions in the calculations of the electronic surface states and scattering wave functions...

[Phys. Rev. E 90, 013306] Published Fri Jul 18, 2014

]]>[Phys. Rev. E 90, 019904] Published Fri Jul 18, 2014

]]>[Phys. Rev. E 90, 019905] Published Fri Jul 18, 2014

]]>Nonreciprocal shape deformations can drive inertialess cellular swimming, as first explored by Taylor and Lighthill in the 1950s, for the small-amplitude squirming of a planar and a spherical surface, respectively. Lighthill's squirmer, in particular, has been extensively studied for large wave numb...

[Phys. Rev. E 90, 012704] Published Thu Jul 17, 2014

]]>We present analytic and numeric results for percolation in a network formed of interdependent spatially embedded networks. We show results for a treelike and a random regular network of networks each with (i) unconstrained dependency links and (ii) dependency links restricted to a maximum Euclidean ...

[Phys. Rev. E 90, 012809] Published Thu Jul 17, 2014

]]>Spatiotemporal patterns, indicating the spatiotemporal variability of individual abundance, are a pronounced scenario in ecological interactions. Most of the existing models for spatiotemporal patterns treat species as homogeneous groups of individuals with average characteristics by ignoring intras...

[Phys. Rev. E 90, 012904] Published Thu Jul 17, 2014

]]>One of the most efficient actuation methods of robotic microswimmers for biomedical applications is by applying time-varying external magnetic fields. In order to improve the design of the swimmer and optimize its performance, one needs to develop simple theoretical models that enable explicit analy...

[Phys. Rev. E 90, 013012] Published Thu Jul 17, 2014

]]>[Phys. Rev. E 90, 019903] Published Thu Jul 17, 2014

]]>We analyze an open system comprised of two parallel totally asymmetric simple exclusion processes with particle attachment and detachment in the bulk under partially asymmetric coupling conditions. The phase diagrams are obtained using boundary layer analysis of continuum mean-field equations and ch...

[Phys. Rev. E 90, 012114] Published Wed Jul 16, 2014

]]>While a leading-edge vortex on an infinite translating wing is shed after a short distance of travel, its counterpart on a finite span revolving insect wing or maple seed membrane exhibits robust attachment. The latter explains the aerodynamic lift generated by such biological species. Here we analy...

[Phys. Rev. E 90, 013011] Published Wed Jul 16, 2014

]]>We show how the formalism used for thermoelectric transport may be adapted to Smoluchowski's seminal thought experiment, also known as Feynman's ratchet and pawl system. Our analysis rests on the notion of useful flux, which for a thermoelectric system is the electrical current and for Feynman's rat...

[Phys. Rev. E 90, 012113] Published Tue Jul 15, 2014

]]>The hydrodynamics of an archetypal low-Reynolds number swimmer, called “squirmer,” near a wall has been numerically studied. For a single squirmer, depending on the swimming mechanism, three different modes are distinguished: (a) the squirmer escaping from the wall, (b) the squirmer swimming along t...

[Phys. Rev. E 90, 013010] Published Tue Jul 15, 2014

]]>The absolute values of the effective attenuation length of an electron in liquid water are determined using soft x-ray O1s photoemission spectroscopy of a liquid beam of water without employing any theoretical estimation or computationally obtained value. The effective attenuation length is greater ...

[Phys. Rev. E 90, 010302] Published Mon Jul 14, 2014

]]>We study a stationary state of a single self-propelled, athermal particle in linear and quadratic external potentials. The self-propulsion is modeled as a fluctuating internal driving force evolving according to the Ornstein-Uhlenbeck process, independently of the state of the particle. Without an e...

[Phys. Rev. E 90, 012111] Published Mon Jul 14, 2014

]]>The Ising and Blume-Emery-Griffiths (BEG) models' critical behavior is analyzed in two dimensions and three dimensions by means of a renormalization group scheme on small clusters made of a few lattice cells. Different kinds of cells are proposed for both ordered and disordered model cases. In parti...

[Phys. Rev. E 90, 012112] Published Mon Jul 14, 2014

]]>We investigate the effect of wall roughness on water electrolyte transport characteristics at different temperatures through carbon nanotubes by using nonequilibrium molecular dynamics simulations. Our results reveal that shearing stress and the nominal viscosity increase with ion concentration in c...

[Phys. Rev. E 90, 012304] Published Mon Jul 14, 2014

]]>The problem of crack pattern formation due to thermal shock loading at the surface of half space is solved numerically using the two-dimensional boundary element method. The results of numerical simulations with 100–200 random simultaneously growing and interacting cracks are used to obtain scaling ...

[Phys. Rev. E 90, 012403] Published Mon Jul 14, 2014

]]>Epidemiclike spreading processes on top of multilayered interconnected complex networks reveal a rich phase diagram of intertwined competition effects. A recent study by the authors [C. Granell et al., Phys. Rev. Lett. 111, 128701 (2013).PRLTAO10.1103/PhysRevLett.111.128701] presented an analysis of...

[Phys. Rev. E 90, 012808] Published Mon Jul 14, 2014

]]>Induced-charge electro-osmosis (ICEO) is important since it can be used for realizing high performance microfluidic devices. Here, we analyze the simplest problem of ion relaxation around a circular polarizable cylinder between parallel blocking electrodes in a closed cell by using a multiphysics co...

[Phys. Rev. E 90, 013007] Published Mon Jul 14, 2014

]]>Acoustical and optical vortices have attracted great interest due to their ability to capture and manipulate particles with the use of radiation pressure. Here we show that acoustical vortices can also induce axial vortical flow reminiscent of cyclones, whose topology can be controlled by adjusting ...

[Phys. Rev. E 90, 013008] Published Mon Jul 14, 2014

]]>A rovibrational collisional model is developed to study the internal energy excitation and dissociation processes behind a strong shock wave in a nitrogen flow. The reaction rate coefficients are obtained from the ab initio database of the NASA Ames Research Center. The master equation is coupled wi...

[Phys. Rev. E 90, 013009] Published Mon Jul 14, 2014

]]>Simulating the dynamics of a semiflexible polymer across time and length scales that bridge the rigid and flexible regimes requires a physically sound method for generating coarse-grained representations of the polymer. Here, we study the dynamic behavior of the discrete stretchable, shearable worml...

[Phys. Rev. E 90, 013304] Published Mon Jul 14, 2014

]]>In this paper, we propose a local nonequilibrium scheme for computing the flux of the convection-diffusion equation with a source term in the framework of the multiple-relaxation-time (MRT) lattice Boltzmann method (LBM). Both the Chapman-Enskog analysis and the numerical results show that, at the d...

[Phys. Rev. E 90, 013305] Published Mon Jul 14, 2014

]]>[Phys. Rev. E 90, 019901] Published Mon Jul 14, 2014

]]>[Phys. Rev. E 90, 019902] Published Mon Jul 14, 2014

]]>We investigate the influence of fluid flows on the propagation of chemical fronts arising in Fisher-Kolmogorov-Petrovsky-Piskunov (FKPP) type models. We develop an asymptotic theory for the front speed in a cellular flow in the limit of small molecular diffusivity and fast reaction, i.e., large Pécl...

[Phys. Rev. E 90, 011001] Published Fri Jul 11, 2014

]]>The author presents a practical method to infer a probability distribution of continuous variables from discrete data, using a modification of previous field-theoretic approaches. A computational implementation for one- and two-dimensional problems is developed.

[Phys. Rev. E 90, 011301] Published Fri Jul 11, 2014

]]>When a closed quantum system is driven periodically with period T, it approaches a periodic state synchronized with the drive in which any local observable measured stroboscopically approaches a steady value. For integrable systems, the resulting behavior is captured by a periodic version of a gener...

[Phys. Rev. E 90, 012110] Published Fri Jul 11, 2014

]]>We report studies on the rheological properties of a liquid crystalline analog of Abrikosov phase in type-II superconductors known as twist-grain-boundary-A (TGBA) phase. The TGBA phase shows a large apparent yield stress compared to the cholesteric (N*) phase. The storage modulus (G′) of the TGBA p...

[Phys. Rev. E 90, 012506] Published Fri Jul 11, 2014

]]>Repeating patterns of spike sequences from a neuronal network have been proposed to be useful in the reconstruction of the network topology. Reverberations in a physiologically realistic model with various physical connection topologies (from random to scale free) have been simulated to study the ef...

[Phys. Rev. E 90, 012703] Published Fri Jul 11, 2014

]]>To control infection spreading on networks, we investigate the effect of observer nodes that recognize infection in a neighboring node and make the rest of the neighbor nodes immune. We numerically show that random placement of observer nodes works better on networks with clustering than on locally ...

[Phys. Rev. E 90, 012807] Published Fri Jul 11, 2014

]]>Velocity correlations are measured in a dusty plasma with only two microparticles. These correlations allow a characterization of the oscillatory modes and an identification of the effects of ion wakes. Ion wake effects are isolated by comparing two experiments with the microparticles aligned parall...

[Phys. Rev. E 90, 013102] Published Fri Jul 11, 2014

]]>We explore spatially localized solitonic configurations of a director field, generated using optical realignment and laser-induced heating, in frustrated chiral nematic liquid crystals confined between substrates with perpendicular surface anchoring. We demonstrate that, in addition to recently stud...

[Phys. Rev. E 90, 012505] Published Thu Jul 10, 2014

]]>Bipartite networks are a common type of network data in which there are two types of vertices, and only vertices of different types can be connected. While bipartite networks exhibit community structure like their unipartite counterparts, existing approaches to bipartite community detection have dra...

[Phys. Rev. E 90, 012805] Published Thu Jul 10, 2014

]]>In network science, assortativity refers to the tendency of links to exist between nodes with similar attributes. In social networks, for example, links tend to exist between individuals of similar age, nationality, location, race, income, educational level, religious belief, and language. Thus, var...

[Phys. Rev. E 90, 012806] Published Thu Jul 10, 2014

]]>Many physical, chemical, and biological systems can be modeled by means of random-frequency harmonic oscillator systems. Even though the noise-free evolution of harmonic oscillator systems can be easily implemented, the way to experimentally introduce, and control, noise effects due to a surrounding...

[Phys. Rev. E 90, 012108] Published Wed Jul 09, 2014

]]>We show that the presence of a driven bond in an otherwise diffusive lattice gas with simple exclusion interaction results in long-range density-density correlation in its stationary state. In dimensions d>1 we show that in the thermodynamic limit this correlation decays as C(r,s)∼(r2+s2)−d at la...

[Phys. Rev. E 90, 012109] Published Wed Jul 09, 2014

]]>We investigate pressure-driven motion of liquid-liquid menisci in circular tubes, for systems in pseudopartial wetting conditions. The originality of this type of wetting lies in the coexistence of a macroscopic contact angle with a wetting liquid film covering the solid surface. Focusing on small c...

[Phys. Rev. E 90, 012402] Published Wed Jul 09, 2014

]]>We present a dynamically equivalent transformation between time series and complex networks based on coarse geometry theory. In terms of quasi-isometric maps, we characterize how the underlying geometrical characters of complex systems are preserved during transformations. Fractal dimensions are sho...

[Phys. Rev. E 90, 012804] Published Wed Jul 09, 2014

]]>The evolution of surface water waves in finite depth under wind forcing is reduced to an antidissipative Korteweg–de Vries–Burgers equation. We exhibit its solitary wave solution. Antidissipation accelerates and increases the amplitude of the solitary wave and leads to blow-up and breaking. Blow-up ...

[Phys. Rev. E 90, 013006] Published Wed Jul 09, 2014

]]>In this work, we investigate the balance between the nonlinear and linear interaction energy of an interparticle anharmonic system in the vicinity of the ground state condensate. As a result, we find that the nonlinear interaction energy is very significant in the vicinity of each degree of freedom....

[Phys. Rev. E 90, 011201] Published Tue Jul 08, 2014

]]>We demonstrate diffusing-wave spectroscopy (DWS) in a localized region of a viscoelastically inhomogeneous object by measurement of the intensity autocorrelation [g2(τ)] that captures only the decay introduced by the temperature-induced Brownian motion in the region. The region is roughly specified ...

[Phys. Rev. E 90, 012303] Published Tue Jul 08, 2014

]]>We investigate the nonlinearity of a liquid crystal cell doped with gold nanoparticles by considering their selective absorption. Such nonlinearities are promising for optical processing applications and optical limiters. Systems displaying thermal nonlinearities are particularly attractive as the m...

[Phys. Rev. E 90, 012504] Published Tue Jul 08, 2014

]]>In a system of interdependent networks, an initial failure of nodes invokes a cascade of iterative failures that may lead to a total collapse of the whole system in the form of an abrupt first-order transition. When the fraction of initial failed nodes 1−p reaches criticality p=pc, the abrupt collap...

[Phys. Rev. E 90, 012803] Published Tue Jul 08, 2014

]]>The dynamics in a variant of globally coupled Sakagui-Kuramoto phase oscillators is studied. The model consists of two subpopulations, each with a different phase lag and interaction strength. Using Ott-Antonson ansatz, we analyze the dynamics in the model and present the numerical results. There ex...

[Phys. Rev. E 90, 012903] Published Tue Jul 08, 2014

]]>We study the chaotic motion of a small rigid sphere, lighter than the fluid in a three-dimensional vortex of finite height. Based on the results of Eulerian and Lagrangian measurements, a sequence of models is set up. The time-independent model is a generalization of the Burgers vortex. In this case...

[Phys. Rev. E 90, 013002] Published Tue Jul 08, 2014

]]>We delineate the contact line dynamics of two immiscible fluids in a medium having spatially periodic porous structures. The flow is driven by an external applied pressure gradient. We bring out the combined consequences of the solid fraction distribution and the substrate wettability on the resulti...

[Phys. Rev. E 90, 013003] Published Tue Jul 08, 2014

]]>A numerical study of dynamos in rotating convecting plane layers is presented which focuses on magnetic energies and dissipation rates and the generation of mean fields (where the mean is taken over horizontal planes). The scaling of the magnetic energy with the flux Rayleigh number is different fro...

[Phys. Rev. E 90, 013004] Published Tue Jul 08, 2014

]]>We extend the classic study of the motion of small ellipsoidal particles under shear, focusing on simplifications obtained by considerations of the extreme aspect ratios typical of rheoscopic particles (e.g., Kalliroscope). Specifically, we study conditions under which the long-time behavior of scal...

[Phys. Rev. E 90, 013005] Published Tue Jul 08, 2014

]]>This work studies a nonconserving driven particle model that displays a phase diagram with features similar to those of equilibrium systems with long-range interactions, such as ensemble inequivalence. It also exhibits features which are specific to nonequilibrium systems, such as steady states with moving density profiles.

[Phys. Rev. E 90, 012107] Published Mon Jul 07, 2014

]]>Using a previously developed coarse-grained model, we conducted large-scale (∼85×85×85nm3) molecular dynamics simulations of uniaxial-strain deformation to study the tensile behavior of an epoxy molding compound, epoxy phenol novolacs (EPN) bisphenol A (BPA). Under the uniaxial-strain deformation, t...

[Phys. Rev. E 90, 012601] Published Mon Jul 07, 2014

]]>Understanding neural variability is currently one of the biggest challenges in neuroscience. Using theory and computational modeling, we study the behavior of a globally coupled inhibitory neural network, in which each neuron follows a purely stochastic two-state spiking process. We investigate the ...

[Phys. Rev. E 90, 012702] Published Mon Jul 07, 2014

]]>We derive exact and approximate localized solutions for the Manakov-type continuous and discrete equations. We establish the correspondence between the solutions of the coupled Ablowitz-Ladik equations and the solutions of the coupled higher-order Manakov equations.

[Phys. Rev. E 90, 012902] Published Mon Jul 07, 2014

]]>We investigate a two-dimensional tiling model. Even though the degrees of freedom in this model are discrete, it has a hidden continuous global symmetry in the infinite lattice limit, whose corresponding Goldstone modes are the quasicrystalline phasonic degrees of freedom. We show that due to this c...

[Phys. Rev. E 90, 012105] Published Thu Jul 03, 2014

]]>The purely repulsive soft-sphere system, where the interaction potential is inversely proportional to the pair separation raised to the power n, is considered. The Laplace transform technique is used to derive its thermodynamic properties in terms of the potential energy and its density derivative o...

[Phys. Rev. E 90, 012106] Published Thu Jul 03, 2014

]]>We analyze the trajectory of suspended spherical particles moving through a square array of obstacles, in the deterministic limit and at zero Reynolds number. We show that in the dilute approximation of widely separated obstacles, the average motion of the particles is equivalent to the trajectory f...

[Phys. Rev. E 90, 012302] Published Thu Jul 03, 2014

]]>We investigate the multiorder parameter phase field model of Steinbach and Pezzolla [Physica D 134, 385 (1999)PDNPDT10.1016/S0167-2789(99)00129-3] concerning its ability to describe grain boundary premelting. For a single order parameter situation solid-melt interfaces are always attractive, which a...

[Phys. Rev. E 90, 012401] Published Thu Jul 03, 2014

]]>A thin layer of nematic liquid crystal (NLC) across which an electric field is applied is a setup of great industrial importance in liquid crystal display devices. There is thus a large literature modeling this situation and related scenarios. A commonly used assumption is that an electric field gen...

[Phys. Rev. E 90, 012503] Published Thu Jul 03, 2014

]]>We numerically examine the transport of active run-and-tumble particles with steric particle-particle interactions driven with a drift force over random disordered landscapes composed of fixed obstacles. For increasing run lengths, the net particle transport initially increases before reaching a max...

[Phys. Rev. E 90, 012701] Published Thu Jul 03, 2014

]]>We study the collective dynamics of modular networks consisting of map-based neurons which generate irregular spike sequences. Three types of intramodule topology are considered: a random Erdös-Rényi network, a small-world Watts-Strogatz network, and a scale-free Barabási-Albert network. The interac...

[Phys. Rev. E 90, 012901] Published Thu Jul 03, 2014

]]>The influence of the texture of a hydrophobic surface on the electro-osmotic slip of the second kind and the electrokinetic instability near charge selective surfaces (permselective membranes, electrodes, or systems of microchannels and nanochannels) is investigated theoretically using a simple mode...

[Phys. Rev. E 90, 013001] Published Thu Jul 03, 2014

]]>A boundary scheme in the lattice Boltzmann method (LBM) for the convection-diffusion equation, which correctly realizes the internal boundary condition at the interface between two phases with different transport properties, is presented. The difficulty in satisfying the continuity of flux at the in...

[Phys. Rev. E 90, 013303] Published Thu Jul 03, 2014

]]>The anomalous preasymptotic transport of colloids in a microfluidic capillary flow due to hydrodynamic dispersion is measured by noninvasive nuclear magnetic resonance (NMR). The data indicate a reduced scaling of mean squared displacement with time from the 〈z(t)2〉c∼t3 behavior for the interaction ...

[Phys. Rev. E 90, 010301] Published Wed Jul 02, 2014

]]>Driven elastic manifolds in random media exhibit a depinning transition to a state with nonvanishing velocity at a critical driving force. We study the depinning of stiff directed lines, which are governed by a bending rigidity rather than line tension. Their equation of motion is the (quenched) Her...

[Phys. Rev. E 90, 012101] Published Wed Jul 02, 2014

]]>The critical exponent η for three-dimensional systems with an n-vector order parameter is evaluated in the framework of the pseudo-ε expansion approach. The pseudo-ε expansion (τ series) for η found up to the τ7 term for n = 0, 1, 2, 3 and within the τ6 order for general n is shown to have a structu...

[Phys. Rev. E 90, 012102] Published Wed Jul 02, 2014

]]>We introduced simple microscopic non-Markovian walk models which describe the underlying mechanism of anomalous diffusions. In the models, we considered the competitions between randomness and memory effects of previous history by introducing the probability parameters. The memory effects were consi...

[Phys. Rev. E 90, 012103] Published Wed Jul 02, 2014

]]>With Monte Carlo simulations, the nonsteady dynamic properties of a domain wall have been systematically investigated for the thermally activated creep state under an alternating driving field. Taking the driven random-field Ising model in two dimensions as an example, two distinct growth stages of ...

[Phys. Rev. E 90, 012104] Published Wed Jul 02, 2014

]]>We study the order-disorder transition of horizontally swirled dry and wet granular disks by means of computer simulations. Our systematic investigation of the local order formation as a function of amplitude and period of the external driving force shows that a large cluster of hexagonally ordered ...

[Phys. Rev. E 90, 012201] Published Wed Jul 02, 2014

]]>We show how the colloidal-probe technique, which is based on force measurements made with the atomic force microscope, can be used to accurately determine the charging parameters of water-solid interfaces. Besides yielding accurate values of the double-layer or diffuse-layer potential, the method al...

[Phys. Rev. E 90, 012301] Published Wed Jul 02, 2014

]]>We have studied the dynamics of micrometer-sized colloidal particles in electrohydrodynamic convection of nematic liquid crystal. Above the onset voltage of electroconvection, the parallel array of convection rolls appears to be perpendicular to the nematic field at first. The particles are forced t...

[Phys. Rev. E 90, 012502] Published Wed Jul 02, 2014

]]>I examine the mean consensus time (i.e., exit time) of the voter model in the so-called two-clique graph. The two-clique graph is composed of two cliques interconnected by some links and considered as a toy model of networks with community structure or multilayer networks. I analytically show that, ...

[Phys. Rev. E 90, 012802] Published Wed Jul 02, 2014

]]>When a piston drives a shock in a multicomponent plasma, residual separation of the ion species persists close to the piston-plasma boundary, long after the shock has propagated away from the boundary and has reached a (nearly) steady-state solution. This effect is observed in hybrid particle-in-cel...

[Phys. Rev. E 90, 013101] Published Wed Jul 02, 2014

]]>Bioelectrochemical systems recover valuable components and energy in the form of hydrogen or electricity from aqueous organic streams. We derive a one-dimensional steady-state model for ion transport in a bioelectrochemical system, with the ions subject to diffusional and electrical forces. Since mo...

[Phys. Rev. E 90, 013302] Published Wed Jul 02, 2014

]]>The topology and the geometry of a surface play a fundamental role in determining the equilibrium configurations of thin films of liquid crystals. We propose here a theoretical analysis of a recently introduced surface Frank energy, in the case of two-dimensional nematic liquid crystals coating a to...

[Phys. Rev. E 90, 012501] Published Tue Jul 01, 2014

]]>We study the problem of estimating the origin of an epidemic outbreak: given a contact network and a snapshot of epidemic spread at a certain time, determine the infection source. This problem is important in different contexts of computer or social networks. Assuming that the epidemic spread follow...

[Phys. Rev. E 90, 012801] Published Tue Jul 01, 2014

]]>Methods for calculating the transmission coefficient are proposed, all of which arise from improved nonreflecting WKB boundary conditions at the edge of the computational domain in one-dimensional geometries. In the first, the Schrödinger equation is solved numerically, while the second is a transfe...

[Phys. Rev. E 90, 013301] Published Tue Jul 01, 2014

]]>Phase-field models are powerful tools to tackle free-boundary problems. For phase transformations involving diffusion, the evolution of the nonconserved phase field is coupled to the evolution of the conserved diffusion field. Introducing the kinetic cross coupling between these two fields [E. A. Br...

[Phys. Rev. E 89, 060402] Published Mon Jun 30, 2014

]]>We describe dipolar nematic colloids comprising mutually bound solid microspheres, three-dimensional skyrmions, and point defects in a molecular alignment field of chiral nematic liquid crystals. Nonlinear optical imaging and numerical modeling based on minimization of Landau–de Gennes free energy r...

[Phys. Rev. E 89, 060502] Published Mon Jun 30, 2014

]]>The pair-approximation method is modified in order to describe systems with geometrical frustration. The Ising antiferromagnet on a triangular lattice with selective dilution (Kaya-Berker model) is considered and a self-consistent thermodynamic description of this model is obtained. For this purpose...

[Phys. Rev. E 89, 062140] Published Mon Jun 30, 2014

]]>We extend the water retention model [C. L. Knecht et al., Phys. Rev. Lett. 108, 045703 (2012)PRLTAO10.1103/PhysRevLett.108.045703] to correlated random surfaces. We find that the retention capacity of discrete random landscapes is strongly affected by spatial correlations among the heights. This phe...

[Phys. Rev. E 89, 062141] Published Mon Jun 30, 2014

]]>We numerically investigate the two-dimensional q-state quantum Potts model on the infinite square lattice by using the infinite projected entangled-pair state (iPEPS) algorithm. We show that the quantum fidelity, defined as an overlap measurement between an arbitrary reference state and the iPEPS gr...

[Phys. Rev. E 89, 062142] Published Mon Jun 30, 2014

]]>We study the effects of an interaction range on the gas-liquid phase diagram and the crossover behavior of a simple model of ionic fluids: an equimolar binary mixture of equisized hard spheres interacting through screened Coulomb potentials which are repulsive between particles of the same species a...

[Phys. Rev. E 89, 062143] Published Mon Jun 30, 2014

]]>Identification of directional influences in multivariate systems is of prime importance in several applications of engineering and sciences such as plant topology reconstruction, fault detection and diagnosis, and neurosciences. A spectrum of related directionality measures, ranging from linear meas...

[Phys. Rev. E 89, 062144] Published Mon Jun 30, 2014

]]>Driven surface diffusion occurs, for example, in molecular beam epitaxy when particles are deposited under an oblique angle. Elastic phase transitions happen when normal modes in crystals become soft due to the vanishing of certain elastic constants. We show that these seemingly entirely disparate s...

[Phys. Rev. E 89, 062145] Published Mon Jun 30, 2014

]]>We consider an invariant random matrix ensemble where the standard Gaussian potential is distorted by an additional single pole of arbitrary fixed order. Potentials with first- and second-order poles have been considered previously and found applications in quantum chaos and number theory. Here we p...

[Phys. Rev. E 89, 062146] Published Mon Jun 30, 2014

]]>Using molecular dynamics simulations, we study freezing of Lennard-Jones particles at commensurate substrate with triangular pattern. Throughout the box particles freeze onto the substrate and form close-packed layers. For the moderately attractive substrates, an intermediate hexatic phase between l...

[Phys. Rev. E 89, 062410] Published Mon Jun 30, 2014

]]>Self-assembly of nanoparticles is an important tool in nanotechnology, with numerous applications, including thin films, electronics, and drug delivery. We study the deposition of ionic nanoparticles on a glass substrate both experimentally and theoretically. Our theoretical model consists of a stoc...

[Phys. Rev. E 89, 062411] Published Mon Jun 30, 2014

]]>The structures of the discotic liquid crystalline (LC) phase of metal-free octa-substituted phthalocyanine (Pc) derivatives were investigated using molecular dynamics (MD) simulations. Special attention was paid to the LC phase structure of the non-peripheral octa-hexyl substituted Pc-derivatives th...

[Phys. Rev. E 89, 062505] Published Mon Jun 30, 2014

]]>The rheology of 44–75-nm-thick polystyrene films were probed by destabilization in an electric field. The non-cross-linked films showed the hallmark of viscoelasiticy; they exhibited elastic behavior at high shear rates and viscous rheology at low shear rates for stationary applied fields. These res...

[Phys. Rev. E 89, 062604] Published Mon Jun 30, 2014

]]>Despite the key role played by inhibitory-excitatory couplings in the functioning of brain networks, the impact of a balanced condition on the stability properties of underlying networks remains largely unknown. We investigate properties of the largest eigenvalues of networks having such couplings, ...

[Phys. Rev. E 89, 062718] Published Mon Jun 30, 2014

]]>Topological features of gene regulatory networks can be successfully reproduced by a model population evolving under selection for short dynamical attractors. The evolved population of networks exhibit motif statistics, summarized by significance profiles, which closely match those of E. coli, S. ce...

[Phys. Rev. E 89, 062719] Published Mon Jun 30, 2014

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