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

]]>Using Monte Carlo computer simulations we explore the self-assembly and ordering behavior of a hybrid, soft magnetic system consisting of small magnetic nanospheres in a liquid-crystalline (LC) matrix. Inspired by recent experiments with colloidal rod matrices, we focus on conditions where the spher…

[Phys. Rev. E 92, 010501(R)] Published Wed Jul 22, 2015

]]>A method to approximately close the dynamic cavity equations for synchronous reversible dynamics on a locally treelike topology is presented. The method builds on (a) a graph expansion to eliminate loops from the normalizations of each step in the dynamics and (b) an assumption that a set of auxilar…

[Phys. Rev. E 92, 010102(R)] Published Tue Jul 21, 2015

]]>We revisit the light or heat-induced changes in topography of initially flat sheets of a solid that elongate or contract along patterned in-plane director fields. For radial or azimuthal directors, negative Gaussian curvature is generated—so-called “anticones.” We show that azimuthal material displa…

[Phys. Rev. E 92, 010401(R)] Published Tue Jul 21, 2015

]]>A water cylinder deposited on a heated channel levitates on its own generated vapor film owing to the Leidenfrost effect. This experimental setup permits the study of the one-dimensional propagation of surface waves in a free-to-move liquid system. We report the observation of gravity-capillary wave…

[Phys. Rev. E 92, 011002(R)] Published Mon Jul 20, 2015

]]>Methods for forecasting time series are a critical aspect of the understanding and control of complex networks. When the model of the network is unknown, nonparametric methods for prediction have been developed, based on concepts of attractor reconstruction pioneered by Takens and others. In this Ra…

[Phys. Rev. E 92, 010902(R)] Published Thu Jul 16, 2015

]]>The self-diffusion coefficient of a granular gas in the homogeneous cooling state is analyzed near the shearing instability. Using mode-coupling theory, it is shown that the coefficient diverges logarithmically as the instability is approached, due to the coupling of the diffusion process with the s…

[Phys. Rev. E 92, 010201(R)] Published Mon Jul 13, 2015

]]>Understanding the relaxation of a system towards equilibrium is a long-standing problem in statistical mechanics. Here we address the role of long-range interactions in this process by considering a class of two-dimensional flows where the interaction between fluid particles varies with the distance…

[Phys. Rev. E 92, 011001(R)] Published Fri Jul 10, 2015

]]>The description of activated relaxation of glassy systems in the multidimensional configurational space is a long-standing open problem. We develop a phenomenological description of the out-of-equilibrium dynamics of a model with a rough potential energy landscape and we analyze it both numerically …

[Phys. Rev. E 92, 010301(R)] Published Thu Jul 09, 2015

]]>Wave shape and velocity are important issues in reaction-diffusion systems, and are often the result of competition in media with heterogeneous conduction properties. Asymptotic wave front propagation at maximal conduction velocity has been previously reported in the context of anisotropic cardiac t…

[Phys. Rev. E 92, 010901(R)] Published Wed Jul 08, 2015

]]>A thin-interface phase-field model of electrochemical interfaces is developed based on Marcus kinetics for concentrated solutions, and used to simulate dendrite growth during electrodeposition of metals. The model is derived in the grand electrochemical potential to permit the interface to be widene…

[Phys. Rev. E 92, 011301(R)] Published Mon Jul 06, 2015

]]>We study the restricted solid on solid model for surface growth in spatial dimension $d=2$ by means of a *multisurface coding* technique that allows one to produce a large number of samples in the stationary regime in a reasonable computational time. Thanks to (i) a careful finite-size scaling analysis …

[Phys. Rev. E 92, 010101(R)] Published Thu Jul 02, 2015

]]>The accuracy of molecular signaling in biological cells and novel diagnostic devices is ultimately limited by the counting noise floor imposed by the thermal diffusion. Motivated by the fact that messenger RNA and vesicle-engulfed signaling molecules transiently bind to molecular motors and are acti…

[Phys. Rev. E 92, 010701(R)] Published Thu Jul 02, 2015

]]>We study the distribution of the mean radial displacement of charges of a two-dimensional (2D) one-component plasma in the thermodynamic limit $N\to \infty $ at finite temperature $\beta >0$. We compute explicitly the large deviation functions showing the emergence of a fourth-order phase transition as a consequen…

[Phys. Rev. E 91, 060105(R)] Published Fri Jun 26, 2015

]]>When DNA molecules are heated they denature. This occurs locally so that loops of molten single DNA strands form, connected by intact double-stranded DNA pieces. The properties of this “melting” transition have been intensively investigated. Recently there has been a surge of interest in this questi…

[Phys. Rev. E 91, 060702(R)] Published Fri Jun 26, 2015

]]>In many complex systems, states and interaction structure coevolve towards a dynamic equilibrium. For the adaptive contact process, we obtain approximate expressions for the degree distributions that characterize the interaction network in such active steady states. These distributions are shown to …

[Phys. Rev. E 91, 060801(R)] Published Fri Jun 26, 2015

]]>We investigate the effect of preferentially connecting oscillators with similar frequency to each other in networks of coupled phase oscillators (i.e., frequency assortativity). Using the network Kuramoto model as an example, we find that frequency assortativity can induce chaos in the macroscopic d…

[Phys. Rev. E 91, 060902(R)] Published Wed Jun 24, 2015

]]>The quantum evolution maps of closed chaotic quantum graphs are unitary and known to have universal spectral correlations matching predictions of random matrix theory. In chaotic graphs with absorption the quantum maps become nonunitary. We show that their spectral statistics exhibit universality at…

[Phys. Rev. E 91, 060901(R)] Published Mon Jun 22, 2015

]]>We introduce an enhanced sampling simulation technique based on continuous tempering, i.e., on continuously varying the temperature of the system under investigation. Our approach is mathematically straightforward, being based on an extended Hamiltonian formulation in which an auxiliary degree of fr…

[Phys. Rev. E 91, 061301(R)] Published Fri Jun 19, 2015

]]>Mechanical avalanches during compression of martensitic porous Ti-Ni have been characterized by high-frequency acoustic emission (AE). Two sequences of AE signals were found in the same sample. The first sequence is mainly generated by detwinning at the early stages of compression while fracture dom…

[Phys. Rev. E 91, 060401(R)] Published Wed Jun 17, 2015

]]>Out-of-equilibrium systems exhibit domain walls between different states. These walls, depending on the type of connected states, can display rich spatiotemporal dynamics. In this Rapid Communication, we investigate the asymmetrical counterpropagation of fronts in an in-plane-switching cell filled w…

[Phys. Rev. E 91, 060501(R)] Published Mon Jun 15, 2015

]]>In this work, we investigate the classical loop models doped with monomers and dimers on a square lattice, whose partition function can be expressed as a tensor network (TN). In the thermodynamic limit, we use the boundary matrix product state technique to contract the partition function TN, and det…

[Phys. Rev. E 91, 060104(R)] Published Thu Jun 11, 2015

]]>The well-known Knudsen paradox observed in pressure driven rarefied gas flows through long capillaries is quantitatively explored by decomposing the particle distribution function into its ballistic and collision parts. The classical channel, tube, and duct Poiseuille flows are considered. The solut…

[Phys. Rev. E 91, 061001(R)] Published Wed Jun 10, 2015

]]>According to the equipartition theorem, in a classical system at equilibrium, thermal energy is equally distributed among the degrees of freedom appearing as quadratic forms in the Hamiltonian. Asking the question what is the *spatial* distribution of the thermal energy, the authors find a general upper bound and show that the details depend on dimensionality, interactions, and disorder.

[Phys. Rev. E 91, 060103(R)] Published Tue Jun 09, 2015

]]>Near the critical point of fluids, critical opalescence results in light attenuation, or turbidity increase, that can be used to probe the universality of critical behavior. Turbidity measurements in SF6 under weightlessness conditions on board the International Space Station are performed to apprai…

[Phys. Rev. E 91, 060101(R)] Published Mon Jun 08, 2015

]]>We derive the joint distribution of the moments $\mathrm{Tr}{Q}^{\kappa}\phantom{\rule{4pt}{0ex}}(\kappa \ge 1)$ of the Wigner-Smith matrix for a chaotic cavity supporting a large number of scattering channels $n$. This distribution turns out to be asymptotically Gaussian, and we compute explicitly averages and covariances. The results are in a compact fo…

[Phys. Rev. E 91, 060102(R)] Published Mon Jun 08, 2015

]]>We find, in a two-dimensional air table granular system, that the reduced diffusion constant ${D}^{*}$ and excess entropy ${S}_{2}^{*}$ follow two distinct scaling laws: ${D}^{*}\sim {e}^{{S}_{2}^{*}}$ for dense liquids and ${D}^{*}\sim {e}^{3{S}_{2}^{*}}$ for dilute ones. The scaling for dense liquids is very similar to that for three-dimensional liquids propose…

[Phys. Rev. E 91, 060201(R)] Published Mon Jun 01, 2015

]]>Protein evolution is frequently explored using minimalist polymer models, however, little attention has been given to the problem of structural drift, or diffusion. Here, we study neutral evolution of small protein motifs using an off-lattice heteropolymer model in which individual monomers interact…

[Phys. Rev. E 91, 060701(R)] Published Mon Jun 01, 2015

]]>The effect of shape asymmetry of microswimmers on their adsorption capacity at confining channel walls is studied by a simple dumbbell model. For a shape polarity of a forward-swimming cone, like the stroke-averaged shape of a sperm, extremely long wall retention times are found, caused by a nonvani…

[Phys. Rev. E 91, 050302(R)] Published Thu May 28, 2015

]]>The authors develop a method for analysis of time series generated by a class of complex processes. They identify the mechanism that causes information divergence at each level in a hierarchy of such processes.

[Phys. Rev. E 91, 050106(R)] Published Wed May 27, 2015

]]>One of the major factors governing the mode of failure in disordered solids is the effective range $R$ over which the stress field is modified following a local rupture event. In a random fiber bundle model, considered as a prototype of disordered solids, we show that the failure mode is nucleation do…

[Phys. Rev. E 91, 050105(R)] Published Tue May 26, 2015

]]>We study the effect of confinement on the mean perimeter of the convex hull of a planar Brownian motion, defined as the minimum convex polygon enclosing the trajectory. We use a minimal model where an infinite reflecting wall confines the walk to one side. We show that the mean perimeter displays a …

[Phys. Rev. E 91, 050104(R)] Published Fri May 22, 2015

]]>An experimental and theoretical study of lyotropic chromonic liquid crystals (LCLCs) confined in cylinders with degenerate planar boundary conditions elucidates LCLC director configurations. When the Frank saddle-splay modulus is more than twice the twist modulus, the ground state adopts an inhomoge…

[Phys. Rev. E 91, 050501(R)] Published Fri May 22, 2015

]]>We consider the single-file motion of colloidal particles interacting via short-range repulsion and placed in a traveling wave potential that varies periodically in time and space. Under suitable driving conditions, a directed time-averaged flow of colloids is generated. We obtain analytic results f…

[Phys. Rev. E 91, 050103(R)] Published Wed May 20, 2015

]]>Learning in restricted Boltzmann machine is typically hard due to the computation of gradients of log-likelihood function. To describe the network state statistics of the restricted Boltzmann machine, we develop an advanced mean-field theory based on the Bethe approximation. Our theory provides an e…

[Phys. Rev. E 91, 050101(R)] Published Mon May 18, 2015

]]>We propose a quantum absorption refrigerator driven by photons. The model uses a four-level system as its working substance and couples simultaneously to hot, cold, and solar heat reservoirs. Explicit expressions for the cooling power ${\stackrel{\u0307}{Q}}_{c}$ and coefficient of performance (COP) ${\eta}_{\text{COP}}$ are derived, with t…

[Phys. Rev. E 91, 050102(R)] Published Mon May 18, 2015

]]>We present results of molecular dynamics simulations for two-dimensional repulsively interacting colloids driven by a one-dimensional asymmetric and commensurate ratchet potential, switching on and off stochastically. This drives a time-averaged directed current of colloids, exhibiting resonance wit…

[Phys. Rev. E 91, 050301(R)] Published Mon May 18, 2015

]]>The Biham-Middleton-Levine (BML) traffic model, a cellular automaton with eastbound and northbound cars moving by turns on a square lattice, has been an underpinning model in the study of collective behavior by cars, pedestrians, and even internet packages. Contrary to initial beliefs that the model…

[Phys. Rev. E 91, 050801(R)] Published Mon May 18, 2015

]]>Conducting beads in a viscous fluid are subjected to a high voltage. The authors observe the formation of a mobile treelike structure that evolves towards dynamic states with higher total current, or equivalently, higher rates of entropy production.

[Phys. Rev. E 91, 050902(R)] Published Mon May 18, 2015

]]>The long-time effect of weak rotation on an internal solitary wave is the decay into inertia-gravity waves and the eventual emergence of a coherent, steadily propagating, nonlinear wave packet. There is currently no entirely satisfactory explanation as to why these wave packets form. Here the initia…

[Phys. Rev. E 91, 051201(R)] Published Mon May 18, 2015

]]>Semiflexible polymers in channels with a rectangular cross section are studied as models for DNA molecules confined to nanochannels. The authors find that the average extension of the polymers is approximately independent of the rectangle aspect ratio, whereas the extension variance depends strongly on both dimensions of the rectangle.

[Phys. Rev. E 91, 050601(R)] Published Thu May 14, 2015

]]>Macroscopic systems with dissipation and time-modulated injection of energy, parametrically driven systems, can self-organize into localized states and/or patterns. We investigate a pulse that travels over a one-dimensional pattern in parametrically driven systems. Based on a minimal prototype model…

[Phys. Rev. E 91, 050901(R)] Published Fri May 08, 2015

]]>Channeling experiments were performed that demonstrate the transport of high-intensity $(>10{}^{18}W/{\mathrm{cm}}^{2})$, multikilojoule laser light through a millimeter-sized, inhomogeneous ($\sim 300\text{\u2212}\mu \mathrm{m}$ density scale length) laser-produced plasma up to overcritical density, which is an important step forward for the fas…

[Phys. Rev. E 91, 051101(R)] Published Mon May 04, 2015

]]>Many shear flows follow a route to turbulence that has striking similarities to bifurcation scenarios in low-dimensional dynamical systems. Among the bifurcations that appear, crisis bifurcations are important because they cause global transitions between open and closed attractors, or indicate dras…

[Phys. Rev. E 91, 041003(R)] Published Thu Apr 30, 2015

]]>We consider developed turbulence in the two-dimensional Gross-Pitaevskii model, which describes wide classes of phenomena from atomic and optical physics to condensed matter, fluids, and plasma. The well-known difficulty of the problem is that the hypothetical local spectra of both inverse and direc…

[Phys. Rev. E 91, 041201(R)] Published Wed Apr 29, 2015

]]>We consider the rotation of small neutrally buoyant axisymmetric particles in a viscous steady shear flow. When inertial effects are negligible the problem exhibits infinitely many periodic solutions, the “Jeffery orbits.” We compute how inertial effects lift their degeneracy by perturbatively solvi…

[Phys. Rev. E 91, 041002(R)] Published Tue Apr 28, 2015

]]>By means of a simple theoretical model and numerical simulations, we demonstrate the presence of persistent energy currents in a lattice of classical nonlinear oscillators with uniform temperature and chemical potential. In analogy with the well-known Josephson effect, the currents are proportional …

[Phys. Rev. E 91, 040102(R)] Published Mon Apr 27, 2015

]]>Granger causality has long been a prominent method for inferring causal interactions between stochastic variables for a broad range of complex physical systems. However, it has been recognized that a moving average (MA) component in the data presents a serious confound to Granger causal analysis, as…

[Phys. Rev. E 91, 040101(R)] Published Thu Apr 23, 2015

]]>For a globally coupled network of semiconductor lasers with delayed optical feedback, we demonstrate the existence of chimera states. The domains of coherence and incoherence that are typical for chimera states are found to exist for the amplitude, phase, and inversion of the coupled lasers. These c…

[Phys. Rev. E 91, 040901(R)] Published Wed Apr 22, 2015

]]>We demonstrate that waves in distinct layers of a neuronal network can become phase locked by common spatiotemporal noise. This phenomenon is studied for stationary bumps, traveling waves, and breathers. A weak noise expansion is used to derive an effective equation for the position of the wave in e…

[Phys. Rev. E 91, 040701(R)] Published Thu Apr 16, 2015

]]>We propose a self-consistent dynamo mechanism for the generation of large-scale magnetic fields in natural objects. Recent computational studies have described the formation of large-scale vortices in rotating turbulent convection. Here we demonstrate that for magnetic Reynolds numbers below the thr…

[Phys. Rev. E 91, 041001(R)] Published Thu Apr 16, 2015

]]>The progress of realizing colloidal structures mimicking natural forms of organization in condensed matter is inherently limited by the availability of suitable colloidal building blocks. To enable new forms of crystalline and quasicrystalline self-organization of colloids, we develop truncated pyra…

[Phys. Rev. E 91, 040501(R)] Published Tue Apr 07, 2015

]]>The understanding of the transport of suprathermal ions in the presence of turbulence is important for fusion plasmas in the burning regime that will characterize reactors, and for space plasmas to understand the physics of particle acceleration. Here, three-dimensional measurements of a supratherma…

[Phys. Rev. E 91, 041101(R)] Published Fri Apr 03, 2015

]]>A rich variety of responsive behavior occurs in complex structured fluids due to their lower symmetries. On the other hand, fluid disorder tends to increase the symmetry of liquid crystal mesophases. Here, we report direct evidence for the existence of a mesophase with ${C}_{S}$ symmetry. The observations …

[Phys. Rev. E 91, 030502(R)] Published Tue Mar 31, 2015

]]>The strong turbulence suppression, mainly for large-scale modes, of two-dimensional self-propelling rods, by increasing the long-range coupling strength $\Gamma $ of low-concentration passive particles, is numerically demonstrated. It is found that large-scale collective rod motion in forms of swirls or jet…

[Phys. Rev. E 91, 030302(R)] Published Mon Mar 30, 2015

]]>Surface nanobubbles are experimentally known to survive for days at hydrophobic surfaces immersed in gas-oversaturated water. This is different from bulk nanobubbles, which are pressed out by the Laplace pressure against *any* gas oversaturation and dissolve in submilliseconds, as derived by Epstein a…

[Phys. Rev. E 91, 031003(R)] Published Fri Mar 27, 2015

]]>A 263-nm Thomson-scattering beam was used to directly probe two-plasmon-decay (TPD) excited electron plasma waves (EPWs) driven by between two and five 351-nm beams on the OMEGA Laser System. The amplitude of these waves was nearly independent of the number of drive beams at constant overlapped inte…

[Phys. Rev. E 91, 031104(R)] Published Thu Mar 26, 2015

]]>This paper studies the steady-state current in a quantum chain driven by both boundary terms and an external force. The authors develop a perturbation expansion allowing for an exact treatment for large forces, and find large current rectification as well as resonance effects in the current at specific values of the force.

[Phys. Rev. E 91, 030103(R)] Published Tue Mar 24, 2015

]]>We present a method that reconstructs both the links and their relative coupling strength of bidirectional weighted networks. Our method requires only measurements of node dynamics as input. Using several examples, we demonstrate that our method can give accurate results for weighted random and weig…

[Phys. Rev. E 91, 030801(R)] Published Tue Mar 24, 2015

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