It is shown that a periodic emergence and destruction of an additional quantum number leads to an exponential growth of energy of a quantum mechanical system subjected to a slow periodic variation of parameters. The main example is given by systems (e.g., quantum billiards and quantum graphs) with p…

[Phys. Rev. E 93, 050203(R)] Published Thu May 26, 2016

]]>In order to mimic the Brownian particle in liquid, molecular dynamics calculations of dilute solutions of spherical fullerene molecules with various sizes in liquid Ar were performed. To establish the scaling equation for self-diffusion coefficient, $D$, of the fullerenes, the dependence of $D$ was exam…

[Phys. Rev. E 93, 050104(R)] Published Tue May 24, 2016

]]>Demonstrating how microscopic dynamics cause large systems to approach thermal equilibrium remains an elusive, longstanding, and actively pursued goal of statistical mechanics. We identify here a dynamical mechanism for thermalization in a general class of two-component dynamical Lorentz gases and p…

[Phys. Rev. E 93, 050103(R)] Published Mon May 23, 2016

]]>We report the experimental realization of a rod diffusing in a two-dimensional obstacle field following the single rod dynamics. We use a silver nanowire as our rod and two types of obstacles: repelling light beams and polymer pillars. We study the effect of hydrodynamic interactions on the transpor…

[Phys. Rev. E 93, 050602(R)] Published Mon May 23, 2016

]]>We derive the dependence of the Reynolds number $\text{Re}$ and the Nusselt number $\text{Nu}$ on the Rayleigh number $\text{Ra}$ and the Prandtl number $\text{Pr}$ in laminar vertical convection (VC), where a fluid is confined between two differently heated isothermal vertical walls. The boundary layer equations in laminar VC yield t…

[Phys. Rev. E 93, 051102(R)] Published Mon May 23, 2016

]]>Metamaterials enable the emergence of novel physical properties due to the existence of an underlying subwavelength structure. Here, we use the Faraday instability to shape the fluid-air interface with a regular pattern. This pattern undergoes an oscillating secondary instability and exhibits sponta…

[Phys. Rev. E 93, 050202(R)] Published Thu May 19, 2016

]]>We study experimentally and computationally the dynamics of granular flow during impacts where intruders strike a collection of disks from above. In the regime where granular force dynamics are much more rapid than the intruder motion, we find that the particle flow near the intruder is proportional…

[Phys. Rev. E 93, 050901(R)] Published Thu May 19, 2016

]]>We report a molecular dynamics simulation study of free-standing films of a blend of linear and cyclic polymer chains. We find that the composition of linear chains at the interface is enhanced relative to their *bulk* value for short chains but is depleted for long chains. Our findings are in agreeme…

[Phys. Rev. E 93, 050501(R)] Published Wed May 18, 2016

]]>We demonstrate particle clustering on macroscopic scales in a coupled nonequilibrium system where two species of particles are advected by a fluctuating landscape and modify the landscape in the process. The phase diagram generated by varying the particle-landscape coupling, valid for all particle d…

[Phys. Rev. E 93, 050102(R)] Published Mon May 16, 2016

]]>By sending a light beam on a homeotropic nematic liquid-crystal cell subjected to a voltage with a photosensitive wall, a stable matter vortex can be induced at the center of the beam. When the applied voltage is decreased, the vortex disappears from the illuminated region; however, the system shows…

[Phys. Rev. E 93, 050201(R)] Published Mon May 16, 2016

]]>We explore in this paper the phenomenon of photofocusing: a coupling between flow vorticity and biased swimming of microalgae toward a light source that produces a focusing of the microswimmer suspension. We combine experiments that investigate the stationary state of this phenomenon as well as the …

[Phys. Rev. E 93, 051101(R)] Published Mon May 16, 2016

]]>Depletion forces arise as a result of an entropic imbalance when small nonadsorbing objects are introduced in a suspension of large objects. This paper explores the experimental consequences of using nonspherical depletants whose anisotropy can be tuned using temperature, and thus it opens up the possibility of immediate, real-time tuning of the interparticle attraction.

[Phys. Rev. E 93, 050601(R)] Published Wed May 11, 2016

]]>We discuss the efficiency of a heat engine operating in a nonequilibrium steady state maintained by two heat reservoirs. Within the general framework of linear irreversible thermodynamics we derive a universal upper bound on the efficiency of the engine operating at arbitrary fixed power. Furthermor…

[Phys. Rev. E 93, 050101(R)] Published Mon May 09, 2016

]]>The relation between seismic moment and fractured area is crucial to earthquake hazard analysis. Experimental catalogs show multiple scaling behaviors, with some controversy concerning the exponent value in the large earthquake regime. Here, we show that the original Olami, Feder, and Christensen mo…

[Phys. Rev. E 93, 051001(R)] Published Fri May 06, 2016

]]>Biological neuronal networks exhibit highly variable spiking activity. Balanced networks offer a parsimonious model of this variability in which strong excitatory synaptic inputs are canceled by strong inhibitory inputs on average, and irregular spiking activity is driven by fluctuating synaptic cur…

[Phys. Rev. E 93, 040302(R)] Published Wed Apr 27, 2016

]]>Bombardment of a solid surface with a broad, obliquely incident ion beam frequently produces nanoscale surface ripples. The primary obstacle that prevents the adoption of ion bombardment as a nanofabrication tool is the high density of defects in the patterns that are typically formed. Our simulatio…

[Phys. Rev. E 93, 040802(R)] Published Mon Apr 25, 2016

]]>We perform discrete element simulations of homogeneous shearing of frictionless cylinders and show that the particles are characterized by orientational order and form a granular liquid crystal. For elongated and flat cylinders, the alignment is in the plane of shearing, while cylinders having an as…

[Phys. Rev. E 93, 040901(R)] Published Fri Apr 22, 2016

]]>We study the dynamics and the phase-space structures of Coulombic and self-gravitating versions of the classical one-dimensional three-body system with periodic boundary conditions. We demonstrate that such a three-body system may be reduced isomorphically to a spatially periodic system of a single …

[Phys. Rev. E 93, 040202(R)] Published Thu Apr 21, 2016

]]>We use microscopic density functional theory to study filling transitions in systems with long-ranged wall-fluid and short-ranged fluid-fluid forces occurring in a right-angle wedge. By changing the strength of the wall-fluid interaction we can induce both wetting and filling transitions over a wide…

[Phys. Rev. E 93, 040801(R)] Published Tue Apr 19, 2016

]]>What kind of one-dimensional modulated nematic structures (ODMNS) can form nonchiral and chiral bent-core and dimeric materials? Here, using the Landau–de Gennes theory of nematics, extended to account for molecular steric polarization, we study a possibility of formation of ODMNS, both in nonchiral…

[Phys. Rev. E 93, 040701(R)] Published Mon Apr 18, 2016

]]>The transformative influence of compressibility on the Kelvin-Helmholtz instability (KHI) at the interface between two fluid streams of different velocities is explicated. When the velocity difference is small (subsonic), shear effects dominate the interface flow dynamics causing monotonic roll-up o…

[Phys. Rev. E 93, 041102(R)] Published Mon Apr 18, 2016

]]>The additivity principle (AP) allows one to compute the current distribution in many one-dimensional nonequilibrium systems. Here we extend this conjecture to general $d$-dimensional driven diffusive systems, and validate its predictions against both numerical simulations of rare events and microscopi…

[Phys. Rev. E 93, 040103(R)] Published Thu Apr 14, 2016

]]>We introduce a model of adaptive temporal networks whose evolution is regulated by an interplay between node activity and dynamic exchange of information through links. We study the model by using a master equation approach. Starting from a homogeneous initial configuration, we show that temporal an…

[Phys. Rev. E 93, 040301(R)] Published Thu Apr 14, 2016

]]>The excitation of precursor solitons ahead of a rapidly moving object in a fluid, a spectacular phenomenon in hydrodynamics that has often been observed ahead of moving ships, has surprisingly not been investigated in plasmas where the fluid model holds good for low frequency excitations such as ion…

[Phys. Rev. E 93, 041201(R)] Published Thu Apr 14, 2016

]]>We study an ensemble of random walkers carrying internal noisy phase oscillators which are synchronized among the walkers by local interactions. Due to individual mobility, the interaction partners of every walker change randomly, hereby introducing an additional, independent source of fluctuations,…

[Phys. Rev. E 93, 040102(R)] Published Fri Apr 08, 2016

]]>We propose a unifying picture where the notion of generalized entropy is related to information theory by means of a group-theoretical approach. The group structure comes from the requirement that an entropy be well defined with respect to the composition of independent systems, in the context of a …

[Phys. Rev. E 93, 040101(R)] Published Wed Apr 06, 2016

]]>Distributions of eigenmodes are widely concerned in both bounded and open systems. In the realm of chaos, counting resonances can characterize the underlying dynamics (regular vs chaotic), and is often instrumental to identify classical-to-quantum correspondence. Here, we study, both theoretically a…

[Phys. Rev. E 93, 040201(R)] Published Mon Apr 04, 2016

]]>An interface structure between turbulence and laminar flow is investigated in two-dimensional channel flow. This spatially localized structure not only sustains itself but also converts the laminar state into turbulence actively. A filtered simulation technique is introduced to understand the invadi…

[Phys. Rev. E 93, 041101(R)] Published Mon Apr 04, 2016

]]>Real-time prediction of signals is a task often encountered in control problems as well as by living systems. Here, a parsimonious prediction approach based on the coupling of a linear relaxation-delay system to a smooth, stationary signal is described. The resulting anticipatory relaxation dynamics…

[Phys. Rev. E 93, 030201(R)] Published Wed Mar 30, 2016

]]>Granular flows in rotating drums transition between two regimes characterized by straight and curved free surfaces. Here we predict this behavior using a depth-integrated theory applicable to general eroding flows. Closure is achieved by a local $\mu \left(I\right)$ rheology and an equation for kinetic energy. Span…

[Phys. Rev. E 93, 030902(R)] Published Mon Mar 28, 2016

]]>An interferometric imaging technique has been proposed to instantly measure the diameter of individual spherical dust particles suspended in a gas discharge plasma. The technique is based on the defocused image analysis of both spherical particles and their binary agglomerates. Above a critical diam…

[Phys. Rev. E 93, 031201(R)] Published Thu Mar 24, 2016

]]>Theoretical attempts proposed so far to describe ordinary percolation processes on real-world networks rely on the locally treelike ansatz. Such an approximation, however, holds only to a limited extent, because real graphs are often characterized by high frequencies of short loops. We present here …

[Phys. Rev. E 93, 030302(R)] Published Wed Mar 23, 2016

]]>Algebraic connectivity, the second eigenvalue of the Laplacian matrix, is a measure of node and link connectivity on networks. When studying interconnected networks it is useful to consider a multiplex model, where the component networks operate together with interlayer links among them. In order to…

[Phys. Rev. E 93, 030301(R)] Published Mon Mar 21, 2016

]]>Smoluchowski's coagulation kinetics is here shown to fail when the coalescing species are dilute and transported by a turbulent flow. The intermittent Lagrangian motion involves correlated violent events that lead to an unexpected rapid occurrence of the largest particles. This new phenomena is here…

[Phys. Rev. E 93, 031102(R)] Published Mon Mar 21, 2016

]]>We demonstrate that a compact manometer experiment allows direct observation of a delay to the classical electric-field-induced Freedericksz transition produced by flow in a highly dispersive nematic liquid crystal layer. The Ericksen-Leslie equations are used to show that a flow aligning torque gen…

[Phys. Rev. E 93, 030701(R)] Published Tue Mar 15, 2016

]]>A two-dimensional dense fluid of frictional grains is shown to exhibit time-chaotic, spatially heterogeneous flow in a range of stress values, $\sigma $, chosen in the unstable region of $\mathsf{s}$-shaped flow curves. Stress-controlled simulations reveal a phase diagram with reentrant stationary flow for small and l…

[Phys. Rev. E 93, 030901(R)] Published Mon Mar 14, 2016

]]>A new approach to turbulence closure is presented that eliminates the need to specify a predefined turbulence model and instead provides for fully adaptive, self-optimizing, autonomic closures. The closure is autonomic in the sense that the simulation itself determines the optimal local, instantaneo…

[Phys. Rev. E 93, 031301(R)] Published Mon Mar 14, 2016

]]>We examine fluid flow through cross-slot devices with various depth to width ratios $\alpha $. At low Reynolds number, Re, flow is symmetric and a sharp boundary exists between the two incoming fluid streams. Above an $\alpha $-dependent critical value, $R{e}_{c}\left(\alpha \right)$, a steady symmetry-breaking bifurcation occurs and a sp…

[Phys. Rev. E 93, 031101(R)] Published Wed Mar 09, 2016

]]>We study a two-dimensional binary mixture of patchy colloids in sedimentation-diffusion equilibrium using Monte Carlo simulation and Wertheim's theory. By tuning the buoyant masses of the colloids we can control the gravity-induced sequence of fluid stacks of differing density and percolation proper…

[Phys. Rev. E 93, 030601(R)] Published Tue Mar 01, 2016

]]>We report that many exact invariant solutions of the Navier-Stokes equations for both pipe and channel flows are well represented by just a few modes of the model of McKeon and Sharma [J. Fluid Mech. **658**, 336 (2010)]. This model provides modes that act as a basis to decompose the velocity field, ord…

[Phys. Rev. E 93, 021102(R)] Published Fri Feb 19, 2016

]]>We study a universal structure of two- and three-dimensional self-gravitating systems in the quasiequilibrium state. It is shown numerically that the two-dimensional self-gravitating system in the quasiequilibrium state has the same kind of density profile as the three-dimensional one, especially wh…

[Phys. Rev. E 93, 020103(R)] Published Tue Feb 16, 2016

]]>The recently discovered chimera state involves the coexistence of synchronized and desynchronized states for a group of identical oscillators. In this work, we show the existence of (inwardly) rotating spiral wave chimeras in the three-component reaction-diffusion systems where each element is *local…*

[Phys. Rev. E 93, 020202(R)] Published Tue Feb 16, 2016

]]>Thunderclouds can produce bremsstrahlung gamma-ray emission, and sometimes even positrons. At 00:27:00 (UT) on 13 January 2012, an intense burst of gamma rays from a thundercloud was detected by the GROWTH experiment, located in Japan, facing the Sea of Japan. The event started with a sharp gamma-ra…

[Phys. Rev. E 93, 021201(R)] Published Tue Feb 16, 2016

]]>We consider the effect of global repulsive coupling on an ensemble of identical excitable elements. An increase of the coupling strength destabilizes the synchronous equilibrium and replaces it with many attracting oscillatory states, created in the transcritical heteroclinic bifurcation. The period…

[Phys. Rev. E 93, 020201(R)] Published Wed Feb 10, 2016

]]>We investigate nonequilibrium fluctuations of a solid surface governed by the stochastic Mullins-Herring equation with conserved noise. This equation describes surface diffusion of adatoms accompanied by their exchange between the surface and the bulk of the solid, when desorption of adatoms is negl…

[Phys. Rev. E 93, 020102(R)] Published Mon Feb 08, 2016

]]>Granular self-assembly of confined non-Brownian spheres under gravity is studied by molecular dynamics simulations. Starting from a disordered phase, dry or cohesive spheres organize, by vibrational annealing, into body-centered-tetragonal or face-centered-cubic structures, respectively. During the …

[Phys. Rev. E 93, 020902(R)] Published Mon Feb 08, 2016

]]>We experimentally demonstrate self-excited oscillation and shedding of millimeter-sized water drops, acoustically levitated in a single-node standing waves cavity, by decreasing the steady acoustic wave intensity below a threshold. The perturbation of the acoustic field by drop motion is a possible …

[Phys. Rev. E 93, 021101(R)] Published Fri Feb 05, 2016

]]>The behaviors of large, dynamic assemblies of macroscopic particles are of direct relevance to geophysical and industrial processes and may also be used as easily studied analogs to micro- or nano-scale systems, or model systems for microbiological, zoological, and even anthropological phenomena. We…

[Phys. Rev. E 93, 020901(R)] Published Thu Feb 04, 2016

]]>The pretransitional behavior of dodecylcyanobiphenyl (12CB) (isotropic–smectic-$A$–solid mesomorphism) with $d=50\phantom{\rule{0.16em}{0ex}}\mathrm{nm}\mathrm{BaTi}{\mathrm{O}}_{3}$ nanoparticles (NPs) linked to the cubic phase was monitored via temperature studies of dielectric constant. Tests were carried out in the isotropic, liquid crystal mesomorphic, and …

[Phys. Rev. E 93, 020701(R)] Published Tue Feb 02, 2016

]]>We derive the single integrodifferential wave equation for the probability density function of the position of a classical one-dimensional Lévy walk with continuous sample paths. This equation involves a classical wave operator together with memory integrals describing the spatiotemporal coupling of…

[Phys. Rev. E 93, 020101(R)] Published Mon Feb 01, 2016

]]>We propose a generic model of driven DNA under the influence of an oscillatory force of amplitude $F$ and frequency $\nu $ and show the existence of a dynamical transition for a chain of finite length. We find that the area of the hysteresis loop, ${A}_{\mathrm{loop}}$, scales with the same exponents as observed in a rece…

[Phys. Rev. E 93, 010402(R)] Published Fri Jan 29, 2016

]]>We propose a theoretical framework within which a robust micromechanical definition of precursors to plastic instabilities, often termed soft spots, naturally emerges. They are shown to be collective displacements (modes) $\widehat{z}$ that correspond to local minima of a barrier function $b\left(\widehat{z}\right)$, which depends …

[Phys. Rev. E 93, 011001(R)] Published Thu Jan 28, 2016

]]>Because of the coupling between local lipid composition and the thickness of the membrane, microphase separation in two-component lipid membranes can take place; such effects may underlie the formation of equilibrium nanoscale rafts. Using a kinetic description, this phenomenon is analytically and n…

[Phys. Rev. E 93, 010401(R)] Published Mon Jan 25, 2016

]]>A symmetry-based theory is developed for the description of (streamwise) kinetic energy $K$ in turbulent pipes at extremely high Reynolds numbers (Re's). The theory assumes a mesolayer with continual deformation of wall-attached eddies which introduce an anomalous dissipation, breaking the exact balan…

[Phys. Rev. E 93, 011102(R)] Published Mon Jan 25, 2016

]]>We study the self-averaging properties and ergodicity of the mean square displacement $m\left(t\right)$ of particles diffusing in $d$ dimensional quenched random environments which give rise to subdiffusive average motion. These properties are investigated in terms of the sample to sample fluctuations as measured …

[Phys. Rev. E 93, 010101(R)] Published Tue Jan 19, 2016

]]>The long wavelength limit of a recent microscopic phase-field crystal (PFC) theory of a binary alloy mixture is used to derive an analytical approximation for the segregation coefficient as a function of the interface velocity, and relate it to the two-point correlation function of the liquid and th…

[Phys. Rev. E 93, 010801(R)] Published Wed Jan 13, 2016

]]>The incremental stiffness characterizes the variation of a material's force response to a small deformation change. In lattices with noninteracting vibrational modes, the excitation of localized states does not have any effect on material properties, such as the incremental stiffness. We report that…

[Phys. Rev. E 93, 010901(R)] Published Tue Jan 12, 2016

]]>We propose a change of style for numerical estimations of physical quantities from measurements to inferences. We estimate the most probable quantities for all the parameter region simultaneously by using the raw data cooperatively. Estimations with higher precisions are made possible. We can obtain…

[Phys. Rev. E 93, 011301(R)] Published Fri Jan 08, 2016

]]>We report the theoretical and experimental demonstration of one-dimensional drifting patterns generated by asymmetrical Fourier filtering in the transverse plane of an optical feedback system with a Kerr type nonlinearity. We show, with good agreement between our theoretical (analytics and numerics)…

[Phys. Rev. E 93, 010201(R)] Published Thu Jan 07, 2016

]]>A theory is developed to explain the sub-Gaussian behavior of the Townsend-Perry constants $\left({A}_{p}\right)$ recently measured for high-order fluctuation moments in turbulent boundary layers. It yields the generalized logarithmic law for high-order moments and ${A}_{p}/{A}_{1}={\left({\ell}^{*}\right)}^{{\zeta}_{p}/p-{\zeta}_{1}}{C}_{p}^{1/p}/{C}_{1}$, where ${\zeta}_{p}$ are the Kolmogor…

[Phys. Rev. E 93, 011101(R)] Published Wed Jan 06, 2016

]]>A self-oscillating gel is a system that generates an autonomous volume oscillation. This oscillation is powered by the chemical energy of the Belousov-Zhabotinsky (BZ) reaction, which demonstrates metal ion redox oscillation. A self-oscillating gel is composed of Poly-$N$-isopropylacrylamide (PNIPAAm)…

[Phys. Rev. E 93, 010501(R)] Published Tue Jan 05, 2016

]]>Nonequilibrium active matter made up of self-driven particles with short-range repulsive interactions is a useful minimal system to study active matter as the system exhibits collective motion and nonequilibrium order-disorder transitions. We studied high-aspect-ratio self-propelled rods over a wide…

[Phys. Rev. E 92, 060501(R)] Published Thu Dec 31, 2015

]]>Temperature gradients polarize water, a nonequilibrium effect that may result in significant electrostatic fields for strong thermal gradients. Using nonequilibrium molecular dynamics simulations, we show that the thermal polarization features a significant dependence with temperature that ultimatel…

[Phys. Rev. E 92, 060103(R)] Published Wed Dec 30, 2015

]]>The pinch off of heterogeneous ferrofluid drops at a nozzle in air was experimentally investigated with a magnetic field (downward or upward) and without a magnetic field. Compared to homogeneous drops, the self-similarity and universal scaling law were verified through modifying the initial conditi…

[Phys. Rev. E 92, 061003(R)] Published Wed Dec 30, 2015

]]>We report charge inversion using Monte Carlo calculations for a negatively charged surface in aqueous solutions involving coions of different charges and monovalent counterions. It is shown that a rise in the valence of coions at moderate concentrations can substantially promote charge inversion for…

[Phys. Rev. E 92, 060303(R)] Published Tue Dec 29, 2015

]]>The phase diagram of the ground states of DNA in a bad solvent is studied for a semiflexible polymer model with a generalized local elastic bending potential characterized by a nonlinearity parameter $x$ and effective self-attraction promoting compaction. $x=1$ corresponds to the wormlike chain model. S…

[Phys. Rev. E 92, 060701(R)] Published Mon Dec 28, 2015

]]>We present a lattice Boltzmann model (LBM) that covers the entire range of fluid flows, from low Mach weakly compressible to transonic and supersonic flows. One of the most restrictive limitations of the lattice Boltzmann method, the low Mach number limit, is overcome here by three fundamental chang…

[Phys. Rev. E 92, 061301(R)] Published Mon Dec 28, 2015

]]>We propose a method to decompose dynamical systems based on the idea that modules constrain the spread of perturbations. We find partitions of system variables that maximize “perturbation modularity,” defined as the autocovariance of coarse-grained perturbed trajectories. The measure effectively sep…

[Phys. Rev. E 92, 060801(R)] Published Wed Dec 23, 2015

]]>A general understanding of optimal control in nonequilibrium systems would illuminate the operational principles of biological and artificial nanoscale machines. Recent work has shown that a system driven out of equilibrium by a linear response protocol is endowed with a Riemannian metric related to…

[Phys. Rev. E 92, 060102(R)] Published Thu Dec 17, 2015

]]>A recurring motif in the organization of biological tissues are networks of long, fibrillar protein strands effectively confined to cylindrical surfaces. Often, the fibers in such curved, quasi-two-dimensional (2D) geometries adopt a characteristic order: the fibers wrap around the central axis at a…

[Phys. Rev. E 92, 060602(R)] Published Thu Dec 17, 2015

]]>We study the dynamics of an ideal polymer chain in a viscoelastic medium and in the presence of active forces. The motion of the center of mass and of individual monomers is calculated. On time scales that are comparable to the persistence time of the active forces, monomers can move superdiffusivel…

[Phys. Rev. E 92, 060601(R)] Published Tue Dec 15, 2015

]]>We study the effect of restart, and retry, on the mean completion time of a generic process. The need to do so arises in various branches of the sciences and we show that it can naturally be addressed by taking advantage of the classical reaction scheme of Michaelis and Menten. Stopping a process in…

[Phys. Rev. E 92, 060101(R)] Published Mon Dec 14, 2015

]]>Chimera states in the systems of nonlocally coupled phase oscillators are considered stable in the continuous limit of spatially distributed oscillators. However, it is reported that in the numerical simulations without taking such limit, chimera states are chaotic transient and finally collapse int…

[Phys. Rev. E 92, 060901(R)] Published Mon Dec 14, 2015

]]>Melting in two dimensions can successfully be explained with the Kosterlitz-Thouless-Halperin-Nelson-Young (KTHNY) scenario which describes the formation of the high-symmetry phase with the thermal activation of topological defects within an (ideally) infinite monodomain. With all state variables be…

[Phys. Rev. E 92, 060302(R)] Published Wed Dec 09, 2015

]]>Dendrite sidebranch detachment is an important fragmentation mechanism during the solidification of alloys. The detachment occurs at the junction between a sidearm and its parent stem. While this pinching process is driven by capillarity, the presence of solidification opposes the instability. Using…

[Phys. Rev. E 92, 060401(R)] Published Mon Dec 07, 2015

]]>We report moment distribution results from a laboratory experiment, similar in character to an isolated strike-slip earthquake fault, consisting of sheared elastic plates separated by a narrow gap filled with a two-dimensional granular medium. Local measurement of strain displacements of the plates …

[Phys. Rev. E 92, 060201(R)] Published Fri Dec 04, 2015

]]>The spontaneous formation of droplets via dewetting of a thin fluid film from a solid substrate allows materials nanostructuring. Often, it is crucial to be able to control the evolution, and to produce patterns characterized by regularly spaced droplets. While thermal fluctuations are expected to p…

[Phys. Rev. E 92, 061002(R)] Published Thu Dec 03, 2015

]]>Flows of suspensions are often affected by wall slip, that is, the fluid velocity ${v}_{f}$ in the vicinity of a boundary differs from the wall velocity ${v}_{w}$ due to the presence of a lubrication layer. While the slip velocity ${v}_{s}=|{v}_{f}-{v}_{w}|$ robustly scales linearly with the stress $\sigma $ at the wall in dilute suspens…

[Phys. Rev. E 92, 060301(R)] Published Wed Dec 02, 2015

]]>Here we show that under quantum reconnection, simulated by using the three-dimensional Gross-Pitaevskii equation, self-helicity of a system of two interacting vortex rings remains conserved. By resolving the fine structure of the vortex cores, we demonstrate that the total length of the vortex syste…

[Phys. Rev. E 92, 061001(R)] Published Wed Dec 02, 2015

]]>The maximum efficiency of autonomous engines with a finite chemical potential difference is investigated. We show that, without a particular type of singularity, autonomous engines cannot attain the Carnot efficiency. This singularity is realized in two ways: single particle transports and the therm…

[Phys. Rev. E 92, 050101(R)] Published Mon Nov 30, 2015

]]>Chimera states in spatially extended networks of oscillators have some oscillators synchronized while the remainder are asynchronous. These states have primarily been studied in networks with nonlocal coupling, and more recently in networks with global coupling. Here, we present three networks with …

[Phys. Rev. E 92, 050904(R)] Published Mon Nov 30, 2015

]]>The effects of the helicity on the dynamics of turbulent flows are investigated. The aim is to disentangle the role of helicity in fixing the direction, the intensity, and the fluctuations of the energy transfer across the inertial range of scales. We introduce an external parameter $\alpha $ that controls …

[Phys. Rev. E 92, 051002(R)] Published Tue Nov 24, 2015

]]>According to Rayleigh's criterion, rotating flows are linearly stable when their specific angular momentum increases radially outward. The celebrated magnetorotational instability opens a way to destabilize those flows, as long as the angular velocity is decreasing outward. Using a local approximati…

[Phys. Rev. E 92, 051001(R)] Published Fri Nov 20, 2015

]]>We report on experimental and theoretical studies of the fluctuation-induced escape time from a metastable state of a nanomechanical Duffing resonator in a cryogenic environment. By tuning *in situ* the nonlinear coefficient $\gamma $ we could explore a wide range of the parameter space around the bifurcation…

[Phys. Rev. E 92, 050903(R)] Published Thu Nov 19, 2015

]]>We report here energetic $(>100\phantom{\rule{0.16em}{0ex}}\mathrm{keV})$ negative hydrogen ions $\left({\mathrm{H}}^{-}\right)$ generated in the interaction of moderately intense $\left({10}^{18}\phantom{\rule{0.16em}{0ex}}\mathrm{W}\phantom{\rule{0.16em}{0ex}}\mathrm{c}{\mathrm{m}}^{-2}\right)$ ultrashort laser pulses (45 fs) with transparent hydrogen containing solid targets. An unambiguous and consistent detection of negative hydrogen ions, with a flux of $8\times {10}^{\mathrm{1\dots}}$

[Phys. Rev. E 92, 051103(R)] Published Mon Nov 16, 2015

]]>Measurements of the structure of the electrostatic fields produced by the expansion of a laser-produced plasma into a background magnetized plasma are presented. The three-dimensional measurements of the electrostatic field are made using an emissive probe that measures the time-varying plasma poten…

[Phys. Rev. E 92, 051102(R)] Published Fri Nov 13, 2015

]]>Disordered hyperuniform (DH) media have been recognized as a new state of disordered matter that broadens our vision of material engineering. Here, long-range correlated disordered two-dimensional patterns are fabricated by self-assembling of spherical diblock-copolymer (BCP) micelles. Control of th…

[Phys. Rev. E 92, 050601(R)] Published Tue Nov 10, 2015

]]>The phase behavior of stabilized dispersions of macromolecules is most easily described in terms of the effective interaction between the centers of mass of solute particles. For molecules such as polymer chains, dendrimers, etc., the effective pair potential is *finite* at the origin, allowing “parti…

[Phys. Rev. E 92, 050301(R)] Published Mon Nov 09, 2015

]]>The well-known Kerr effect in isotropic fluids consists in the appearance of uniaxial orientational order and birefringence that grows as the square of the applied electric field. We predict and observe that at a high electric field, the Kerr effect displays features caused by the nonlinear dependen…

[Phys. Rev. E 92, 050501(R)] Published Mon Nov 09, 2015

]]>We show that the key ingredients for creating recurrent traveling spatial phase defects in drifting patterns are a noise-sustained structure regime together with the vicinity of a phase transition, that is, a spatial region where the control parameter lies close to the threshold for pattern formatio…

[Phys. Rev. E 92, 050902(R)] Published Fri Nov 06, 2015

]]>We present time-resolved observations of Rayleigh-Taylor-instability (RTI) evolution at the interface between an unmagnetized plasma jet colliding with a stagnated, magnetized plasma. The observed instability growth time $\left(\sim 10\phantom{\rule{4pt}{0ex}}\mu \mathrm{s}\right)$ is consistent with the estimated linear RTI growth rate calculated usin…

[Phys. Rev. E 92, 051101(R)] Published Fri Nov 06, 2015

]]>Many eukaryotic cells undergo frequent shape changes (described as amoeboid motion) that enable them to move forward. We investigate the effect of confinement on a minimal model of amoeboid swimmer. A complex picture emerges: (i) The swimmer's nature (i.e., either pusher or puller) can be modified b…

[Phys. Rev. E 92, 050701(R)] Published Wed Nov 04, 2015

]]>A small mismatch between natural frequencies of unidirectionally coupled chaotic oscillators can induce coherence resonance in the slave oscillator for a certain coupling strength. This surprising phenomenon resembles “stabilization of chaos by chaos,” i.e., the chaotic driving applied to the chaoti…

[Phys. Rev. E 92, 050901(R)] Published Mon Nov 02, 2015

]]>We model the cytoskeleton as a fractal network by identifying each segment with a simple Kelvin-Voigt element with a well defined equilibrium length. The final structure retains the elastic characteristics of a solid or a gel, which may support stress, without relaxing. By considering a very simple …

[Phys. Rev. E 92, 040702(R)] Published Thu Oct 29, 2015

]]>Bouncing walking droplets possess fascinating properties due to their peculiar wave-particle interaction leading to unexpected quantumlike behaviors. We propose a study consisting in droplets walking along annular cavities. We show that, in this geometry, they spontaneously form a string of synchron…

[Phys. Rev. E 92, 041004(R)] Published Thu Oct 29, 2015

]]>We present a formulation of the model of laser-plasma interaction (LPI) at hydrodynamical scales that couples the plasma dynamics with linear and nonlinear LPI processes, including the creation and propagation of high-energy electrons excited by parametric instabilities and collective effects. This …

[Phys. Rev. E 92, 041101(R)] Published Thu Oct 29, 2015

]]>We experimentally probe the anisotropy of weakly vibrated flowing granular media. Depending on the driving parameters—flow rate and vibration strength—this anisotropy varies significantly. We show how the anisotropy collapses when plotted as a function of the driving stresses, uncovering a direct li…

[Phys. Rev. E 92, 040201(R)] Published Wed Oct 28, 2015

]]>We study experimentally the miscible radial displacement of a more viscous fluid by a less viscous one in a horizontal Hele-Shaw cell. For the range of tested injection rates and viscosity ratios we observe two regimes for the evolution of the fluid-fluid interface. At early times the interface leng…

[Phys. Rev. E 92, 041003(R)] Published Wed Oct 28, 2015

]]>We investigate soliton mobility in the disordered Ablowitz-Ladik (AL) model and the standard nonlinear Schrödinger (NLS) lattice with the help of an effective potential generalizing the Peierls-Nabarro potential. This potential results from a deviation from integrability, which is due to randomness…

[Phys. Rev. E 92, 040903(R)] Published Tue Oct 27, 2015

]]>An analytical expression for the fluctuation-rounded stretch-coil transition of semiflexible polymers in extensional flows is derived. The competition between elasticity and tension is known to cause a buckling instability in filaments placed near hyperbolic stagnation points and the effect of therm…

[Phys. Rev. E 92, 041002(R)] Published Tue Oct 20, 2015

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