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

]]>A strongly nonintegrable system is expected to satisfy the eigenstate thermalization hypothesis, which states that the expectation value of an observable in an energy eigenstate is the same as the thermal value. This must be revised if the observable is an order parameter for a spontaneously broken …

[Phys. Rev. E 92, 040103(R)] Published Mon Oct 19, 2015

]]>We study the probability that two directed polymers in the same random potential do not intersect. We use the replica method to map the problem onto the attractive Lieb-Liniger model with generalized statistics between particles. Employing both the nested Bethe ansatz and known formula from MacDonal…

[Phys. Rev. E 92, 040102(R)] Published Mon Oct 12, 2015

]]>Surface interactions can cause freely suspended thin liquid crystalline films to form phases different from the bulk material, but it is not known what happens at the surface of thick films. Edge dislocations can be used as a marker for the boundary between the bulk center and the reconstructed surf…

[Phys. Rev. E 92, 040501(R)] Published Thu Oct 08, 2015

]]>A problem typically encountered when studying complex systems is the limitedness of the information available on their topology, which hinders our understanding of their structure and of the dynamical processes taking place on them. A paramount example is provided by financial networks, whose data a…

[Phys. Rev. E 92, 040802(R)] Published Thu Oct 08, 2015

]]>It is demonstrated how to generate time series with tailored nonlinearities by inducing well-defined constraints on the Fourier phases. Correlations between the phase information of adjacent phases and (static and dynamic) measures of nonlinearities are established and their origin is explained. By …

[Phys. Rev. E 92, 040902(R)] Published Thu Oct 08, 2015

]]>We investigate site percolation on a weighted planar stochastic lattice (WPSL), which is a multifractal and whose dual is a scale-free network. Percolation is typically characterized by a threshold value ${p}_{c}$ at which a transition occurs and by a set of critical exponents $\beta ,\gamma ,\nu $ which describe the cr…

[Phys. Rev. E 92, 040101(R)] Published Tue Oct 06, 2015

]]>Connectivity and conductivity of two-dimensional fracture networks (FNs), as an important type of continuous random networks, are examined systematically through Monte Carlo simulations under a variety of conditions, including different power law distributions of the fracture lengths and domain size…

[Phys. Rev. E 92, 041001(R)] Published Tue Oct 06, 2015

]]>An interconnected network features a structural transition between two regimes [F. Radicchi and A. Arenas, Nat. Phys. **9**, 717 (2013)]: one where the network components are structurally distinguishable and one where the interconnected network functions as a whole. Our exact solution for the coupling t…

[Phys. Rev. E 92, 040801(R)] Published Mon Oct 05, 2015

]]>Networks of fast nonlinear elements may display slow fluctuations if interactions are strong. We find a transition in the long-term variability of a sparse recurrent network of perfect integrate-and-fire neurons at which the Fano factor switches from zero to infinity and the correlation time is mini…

[Phys. Rev. E 92, 040901(R)] Published Mon Oct 05, 2015

]]>Diffusive transport is a universal phenomenon, throughout both biological and physical sciences, and models of diffusion are routinely used to interrogate diffusion-driven processes. However, most models neglect to take into account the role of volume exclusion, which can significantly alter diffusi…

[Phys. Rev. E 92, 040701(R)] Published Fri Oct 02, 2015

]]>Dynamics of low-temperature water in nanostructured materials is important to a variety of phenomena, ranging from transport in cement and asphaltene, to conformational dynamics of proteins in “crowded” cellular environments, survival of microorganisms at very low temperatures, and diffusion in nano…

[Phys. Rev. E 92, 030301(R)] Published Tue Sep 29, 2015

]]>We investigate poly($N$-isopropylacrylamide) (pNIPAM) microgels randomly copolymerized with large mol % of protonated acrylic acid (AAc), finding that above the lower critical solution temperature the presence of the acid strongly disrupts pNIPAM's collapse, leading to unexpected new behavior at high …

[Phys. Rev. E 92, 030302(R)] Published Tue Sep 29, 2015

]]>We solve the Navier-Stokes equations with two simultaneous forcings. One forcing is applied at a given large scale and it injects energy. The other forcing is applied at all scales belonging to the inertial range and it injects helicity. In this way we can vary the degree of turbulence helicity from…

[Phys. Rev. E 92, 031004(R)] Published Mon Sep 28, 2015

]]>We study a liquid of zigzagging two-dimensional directed polymers with bending rigidity, i.e., polymers whose conformations follow checkerboard paths. In the continuum limit the statistics of such polymers obey the Dirac equation for particles of imaginary mass. We exploit this observation to invest…

[Phys. Rev. E 92, 030601(R)] Published Thu Sep 24, 2015

]]>Some quantitative aspects of laser-irradiated pure metals, while approaching phase explosion, are still not completely understood. Here, we develop a model that describes the main quantities regulating the liquid-vapor explosive phase transition and the expulsion of liquid nanodroplets that, by soli…

[Phys. Rev. E 92, 031301(R)] Published Mon Sep 21, 2015

]]>The continuous-time adaptive susceptible-infected-susceptible (ASIS) epidemic model and the adaptive information diffusion (AID) model are two adaptive spreading processes on networks, in which a link in the network changes depending on the infectious state of its end nodes, but in opposite ways: (i…

[Phys. Rev. E 92, 030801(R)] Published Tue Sep 15, 2015

]]>Two symmetrically coupled populations of $N$ oscillators with inertia $m$ display chaotic solutions with broken symmetry similar to experimental observations with mechanical pendulums. In particular, we report evidence of intermittent chaotic chimeras, where one population is synchronized and the other …

[Phys. Rev. E 92, 030901(R)] Published Wed Sep 09, 2015

]]>The twist-bend nematic phase, ${N}_{\mathrm{TB}}$, may be viewed as a heliconical molecular arrangement in which the director $\mathbf{n}$ precesses uniformly about an extra director field, $\mathbf{t}$. It corresponds to a nematic ground state exhibiting nanoscale periodic modulation. To demonstrate the stability of this phase from the…

[Phys. Rev. E 92, 030501(R)] Published Tue Sep 08, 2015

]]>We investigate the coupled dynamics of the local hydrodynamics and global electric response of an electrodialysis system, which consists of an electrolyte solution adjacent to a charge selective membrane under electric forcing. Under a dc electric current, counterions transport through the charged m…

[Phys. Rev. E 92, 031003(R)] Published Tue Sep 08, 2015

]]>We investigate experimentally the steady flows in a cylinder containing two immiscible liquids, with the primary fluid being driven by the upper boundary rotating at constant speeds. The system exhibits interesting interplays between the flow fields and the morphology of the interface, with evidence…

[Phys. Rev. E 92, 031002(R)] Published Fri Sep 04, 2015

]]>Many biological systems can sense periodical variations in a stimulus input and produce well-timed, anticipatory responses after the input is removed. Such systems show memory effects for retaining timing information in the stimulus and cannot be understood from traditional synchronization considera…

[Phys. Rev. E 92, 030701(R)] Published Wed Sep 02, 2015

]]>A linear stability analysis and an experimental study of a viscoelastic Taylor-Couette flow corotating in the Keplerian ratio allow us to elucidate the analogy between the viscoelastic instability and the magnetorotational instability (MRI). A generalized Rayleigh criterion allows us to determine th…

[Phys. Rev. E 92, 031001(R)] Published Wed Sep 02, 2015

]]>Thin-shell instability is one process which can generate entangled structures in astrophysical plasma on collisional (fluid) scales. It is driven by a spatially varying imbalance between the ram pressure of the inflowing upstream plasma and the downstream's thermal pressure at a nonplanar shock. Her…

[Phys. Rev. E 92, 031101(R)] Published Tue Sep 01, 2015

]]>We examine fluctuations in particle density in the restricted-height, conserved stochastic sandpile (CSS). In this and related models, the global particle density is a temperaturelike control parameter. Thus local fluctuations in this density correspond to disorder; if this disorder is a relevant pe…

[Phys. Rev. E 92, 020104(R)] Published Tue Aug 25, 2015

]]>We show that the expression for the equilibrium thermodynamic entropy contains an integral over a surface in phase space, and in so doing, we confirm that negative temperature is a valid thermodynamic concept. This demonstration disproves the claims of several recent papers that the Gibbs entropy, w…

[Phys. Rev. E 92, 020103(R)] Published Fri Aug 21, 2015

]]>Dense suspensions display complex flow properties, intermediate between solid and liquid. When sheared, a suspension self-organizes and forms particle clusters that are likely to percolate, possibly leading to significant changes in the overall behavior. Some theoretical conjectures on percolation i…

[Phys. Rev. E 92, 020301(R)] Published Fri Aug 21, 2015

]]>We propose a dynamical mechanism leading to the fluidization by external mechanical fluctuations of soft-glassy amorphous material driven below the yield stress. The model is based on the combination of memory effect and nonlinearity, leading to an accumulation of tiny effects over a long term. We t…

[Phys. Rev. E 92, 020201(R)] Published Thu Aug 20, 2015

]]>Electron-scale surface waves are shown to be unstable in the transverse plane of a sheared flow in an initially unmagnetized collisionless plasma, not captured by (magneto)hydrodynamics. It is found that these unstable modes have a higher growth rate than the closely related electron-scale Kelvin-He…

[Phys. Rev. E 92, 021101(R)] Published Wed Aug 19, 2015

]]>When a bubble ruptures at a liquid surface the collapsing cavity produces a central jet that frequently breaks up into a series of droplets. Current experiment and theory predict that the production of jet drops will be limited by either viscous or gravitational effects. However, while there are a n…

[Phys. Rev. E 92, 021002(R)] Published Mon Aug 17, 2015

]]>We present an analytical treatment of the acoustics of liquid-filled wine glasses, or “glass harps.” The solution is generalized such that under certain assumptions it reduces to previous glass harp models, but also leads to a proposed musical instrument, the “inverted glass harp,” in which an empty…

[Phys. Rev. E 92, 021003(R)] Published Mon Aug 17, 2015

]]>We study the two-particle annihilation reaction $A+B\to \varnothing $ on interconnected scale-free networks, using different interconnecting strategies. We explore how the mixing of particles and the process evolution are influenced by the number of interconnecting links, by their functional properties, and by the …

[Phys. Rev. E 92, 020801(R)] Published Mon Aug 10, 2015

]]>In this Rapid Communication, we address a crucial point regarding the description of moderate to high Reynolds numbers aquatic swimmers. For decades, swimming animals have been classified in two different families of propulsive mechanisms based on the Reynolds number: the resistive swimmers, using l…

[Phys. Rev. E 92, 021001(R)] Published Mon Aug 10, 2015

]]>We numerically investigate quantum quenches of a nonintegrable hard-core Bose-Hubbard model to test the accuracy of the microcanonical ensemble in small isolated quantum systems. We show that, in a certain range of system size, the accuracy increases with the dimension of the Hilbert space $D$ as $1/D$.…

[Phys. Rev. E 92, 020102(R)] Published Wed Aug 05, 2015

]]>We consider the local load-sharing fiber bundle model in one to five dimensions. Depending on the breaking threshold distribution of the fibers, there is a transition where the fracture process becomes localized. In the localized phase, the model behaves as the invasion percolation model. The differ…

[Phys. Rev. E 92, 020401(R)] Published Wed Aug 05, 2015

]]>Temperature inversions occur in nature, e.g., in the solar corona and in interstellar molecular clouds: Somewhat counterintuitively, denser parts of the system are colder than dilute ones. We propose a simple and appealing way to *spontaneously* generate temperature inversions in systems with long-ran…

[Phys. Rev. E 92, 020101(R)] Published Mon Aug 03, 2015

]]>We report on finite-sized-induced transitions to synchrony in a population of phase oscillators coupled via a nonlinear mean field, which microscopically is equivalent to a hypernetwork organization of interactions. Using a self-consistent approach and direct numerical simulations, we argue that a t…

[Phys. Rev. E 92, 020901(R)] Published Mon Aug 03, 2015

]]>A composite metallic foil (Al/Mg/Al) has been exposed to intense sub-100 fs free electron laser (FEL) pulses and driven to ultrafast massive photoionization. The resulting nonequilibrium state of matter has been monitored through absorption spectroscopy across the ${L}_{2,3}$ edge of Mg as a function of th…

[Phys. Rev. E 92, 011101(R)] Published Fri Jul 31, 2015

]]>We examine experimentally the deformation of flexible, microscale helical ribbons with nanoscale thickness subject to viscous flow in a microfluidic channel. Two aspects of flexible microhelices are quantified: the overall shape of the helix and the viscous frictional properties. The frictional coef…

[Phys. Rev. E 92, 011004(R)] Published Thu Jul 30, 2015

]]>We introduce a simple lattice model in which percolation is constructed on top of critical percolation clusters, and find compelling numerical evidence that it can be repeated recursively any number $n$ of generations. In two dimensions, we determine the percolation thresholds up to $n=5$. The correspon…

[Phys. Rev. E 92, 010103(R)] Published Mon Jul 27, 2015

]]>Biopolymers are characterized by heterogeneous interactions, and usually perform their biological tasks forming contacts within domains of limited size. Combining polymer theory with a replica approach, we study the scaling properties of the probability of contact formation in random heteropolymers …

[Phys. Rev. E 92, 010702(R)] Published Mon Jul 27, 2015

]]>We consider practical synchronization on complex dynamical networks under linear feedback control designed by optimal control theory. The control goal is to minimize global synchronization error and control strength over a given finite time interval, and synchronization error at terminal time. By ut…

[Phys. Rev. E 92, 010903(R)] Published Mon Jul 27, 2015

]]>We report on chemoconvective pattern formation phenomena observed in a two-layer system of miscible fluids filling a vertical Hele-Shaw cell. We show both experimentally and theoretically that the concentration-dependent diffusion coupled with frontal acid-base neutralization can give rise to the fo…

[Phys. Rev. E 92, 011003(R)] Published Mon Jul 27, 2015

]]>We study the effect of freeze-thaw cycling on the packing fraction of equal spheres immersed in water. The water located between the grains experiences a dilatation during freezing and a contraction during melting. After several cycles, the packing fraction converges to a particular value ${\eta}_{\infty}=0.595$ i…

[Phys. Rev. E 92, 010202(R)] Published Thu Jul 23, 2015

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