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

]]>We explore the crystallization of charged colloidal particles in a nonpolar solvent mixture. We simultaneously charge the particles and add counterions to the solution with aerosol-OT (AOT) reverse micelles. At low AOT concentrations, the charged particles crystallize into body-centered-cubic (bcc) ...

[Phys. Rev. E 91, 030301(R)] Published Mon Mar 23, 2015

]]>Hierarchical organization is a cornerstone of complexity and multifractality constitutes its central quantifying concept. For model uniform cascades the corresponding singularity spectra are symmetric while those extracted from empirical data are often asymmetric. Using selected time series represen...

[Phys. Rev. E 91, 030902(R)] Published Fri Mar 20, 2015

]]>The authors study synchronization of oscillating micron-sized elliptical particles that are dispersed in water and trapped in separate focused laser beams. The experimental observations can be described by a phenomenological model for optical and hydrodynamic forces. This system of oscillating particles could serve as a model for studying hydrodynamic synchronization of biological cilia.

[Phys. Rev. E 91, 031002(R)] Published Fri Mar 20, 2015

]]>Scroll waves of reentrant activity and their interactions pose a serious threat to cardiac health. In experiments with the Belousov-Zhabotinsky reaction we demonstrate the interaction of scroll waves. We show that depending on their mutual orientation, two scroll rings can push each other away and r...

[Phys. Rev. E 91, 030901(R)] Published Wed Mar 18, 2015

]]>The isometric fluctuation relation (IFR) [P. I. Hurtado *et al.*, Proc. Natl. Acad. Sci. USA **108**, 7704 (2011)] relates the relative probability of current fluctuations of fixed magnitude in different spatial directions. We test its validity in an experiment on a tapered rod, rendered motile by vertic...

[Phys. Rev. E 91, 030102(R)] Published Fri Mar 13, 2015

]]>Three-dimensional wave propagation simulations and experiments show that the gain exponent, an often used metric to assess the likelihood of stimulated Brillouin scatter, is insufficient and must be augmented with another parameter, ${N}_{r}$, the ratio of the resonance length, ${L}_{\text{res}}$, to the laser speckle l...

[Phys. Rev. E 91, 031103(R)] Published Fri Mar 13, 2015

]]>Attempts to extend the capillary-wave theory of fluid interfacial fluctuations to microscopic wavelengths, by introducing an effective wave-vector $\left(q\right)$ -dependent surface tension ${\sigma}_{\mathrm{eff}}\left(q\right)$, have encountered difficulties. There is no consensus as to even the shape of ${\sigma}_{\mathrm{eff}}\left(q\right)$. By analyzing a simple densi...

[Phys. Rev. E 91, 030401(R)] Published Wed Mar 11, 2015

]]>It is demonstrated that a novel heating configuration applied to a large and cold magnetized plasma allows the study of avalanche phenomena under controlled conditions. Intermittent collapses of the plasma pressure profile, associated with unstable drift-Alfvén waves, exhibit a two-slope power-law s...

[Phys. Rev. E 91, 031102(R)] Published Wed Mar 11, 2015

]]>The conventional second-order path-integral Monte Carlo method is plagued with the sign problem in solving many-fermion systems. This is due to the large number of antisymmetric free-fermion propagators that are needed to extract the ground state wave function at large imaginary time. In this work w...

[Phys. Rev. E 91, 031301(R)] Published Wed Mar 11, 2015

]]>We study statistical properties of packings of monodisperse spheres in a flat box. After “gravitational” filling and appropriate agitation, a nearly regular (in plane) but frustrated (normal to the plane) triangular lattice forms, where beads at individual sites touch either the front or back wall. ...

[Phys. Rev. E 91, 030201(R)] Published Tue Mar 10, 2015

]]>We observe that topological defects in nematic colloids are strongly influenced by the elasticity and onset of smectic layering across the nematic $\left(N\right)$ to smectic-$A\left(\mathrm{Sm}A\right)$ phase transition. When approaching the $\mathrm{Sm}A$ phase from above, the nematic hyperbolic hedgehog defect that accompanies a spherical c...

[Phys. Rev. E 91, 030501(R)] Published Tue Mar 10, 2015

]]>At high angles of attack, an aircraft wing stalls. This dreaded event is characterized by the development of a leading edge vortex on the upper surface of the wing, followed by its shedding which causes a drastic drop in the aerodynamic lift. At similar angles of attack, the leading edge vortex on a...

[Phys. Rev. E 91, 031001(R)] Published Tue Mar 10, 2015

]]>We propose a design adjustment to the high foot laser pulse [T. R. Dittrich *et al.*, Phys. Rev. Lett. **112**, 055002 (2014)] that is predicted to lower the fuel adiabat, increase compression and neutron production, but maintain similar ablation front growth. This is accomplished by lowering the laser p...

[Phys. Rev. E 91, 031101(R)] Published Mon Mar 09, 2015

]]>We study probability distribution of a steady state of a periodically driven system coupled to a thermal bath by using a quantum master equation in the weak-coupling limit. It is proved that, even when the external field is strong, the probability distribution is independent of the detailed nature o...

[Phys. Rev. E 91, 030101(R)] Published Tue Mar 03, 2015

]]>Here we characterize the low-noise regime of a stochastic model for a negative self-regulating binary gene. The model has two stochastic variables, the protein number and the state of the gene. Each state of the gene behaves as a protein source governed by a Poisson process. The coupling between the...

[Phys. Rev. E 91, 020701(R)] Published Thu Feb 26, 2015

]]>Flame particles are mathematical points comoving with a reacting isoscalar surface in a premixed flame. In this Rapid Communication, we investigate mean square pair separation of flame particles as a function of time from their positions tracked in two sets of direct numerical simulation solutions o...

[Phys. Rev. E 91, 021001(R)] Published Thu Feb 26, 2015

]]>Indirect-drive implosions with a high-density carbon (HDC) capsule were conducted on the National Ignition Facility (NIF) to test HDC properties as an ablator material for inertial confinement fusion. A series of five experiments were completed with $76\text{\u2212}\mu \mathrm{m}$-thick HDC capsules using a four-shock laser ...

[Phys. Rev. E 91, 021101(R)] Published Wed Feb 25, 2015

]]>We demonstrate reservoir computing with a physical system using a single autonomous Boolean logic element with time-delay feedback. The system generates a chaotic transient with a window of consistency lasting between 30 and 300 ns, which we show is sufficient for reservoir computing. We then charac...

[Phys. Rev. E 91, 020801(R)] Published Mon Feb 23, 2015

]]>We study a seven-state Potts glass model in three dimensions with first-, second-, and third-nearest-neighbor interactions with a bimodal distribution of couplings by Monte Carlo simulations. Our results show the existence of a spin-glass transition at a finite temperature ${T}_{c}$, a discontinuous jump o...

[Phys. Rev. E 91, 020102(R)] Published Fri Feb 20, 2015

]]>We investigate the influence of large noise on the formation of localized patterns in the framework of the cubic-quintic complex Ginzburg-Landau equation. The interaction of localization and noise can lead to filling in or noisy localized structures for fixed noise strength. To focus on the interact...

[Phys. Rev. E 91, 020901(R)] Published Fri Feb 20, 2015

]]>A bulk metallic glass forming alloy is subjected to shear flow in its supercooled state by compression of a short rod to produce a flat disk. The resulting material exhibits enhanced crystallization kinetics during isothermal annealing as reflected in the decrease of the crystallization time relativ...

[Phys. Rev. E 91, 020301(R)] Published Wed Feb 18, 2015

]]>We show that the presence of a Coriolis force in a rotating linear lattice imposes a nonreciprocal propagation of the phononic heat carriers. Using this effect we propose the concept of Coriolis linear thermal circulator which can control the circulation of a heat current. A simple model of three co...

[Phys. Rev. E 91, 020101(R)] Published Fri Feb 13, 2015

]]>We present a molecular dynamics simulation study on the controlling factors that influence the wettability of a hairy surface. By adopting the hairs with appropriate grafting density, hair length, and hair rigidity, the hairy surface shows good performance on droplet repellency. When the droplet sit...

[Phys. Rev. E 91, 020401(R)] Published Tue Feb 03, 2015

]]>By means of numerical simulations, we show that assemblies of frictionless rigid pentagons in slow shear flow possess an internal friction coefficient (equal to $0.183\pm 0.008$ with our choice of moderately polydisperse grains) but no macroscopic dilatancy. In other words, despite side-side contacts ten...

[Phys. Rev. E 91, 010202(R)] Published Fri Jan 30, 2015

]]>We report erosion of synchronization in networks of coupled phase oscillators, a phenomenon where perfect phase synchronization is unattainable in steady state, even in the limit of infinite coupling. An analysis reveals that the total erosion is separable into the product of terms characterizing co...

[Phys. Rev. E 91, 010802(R)] Published Wed Jan 28, 2015

]]>To bridge the gap between single and isolated pore systems to multipore systems, such as membranes and electrodes, we studied an array of nanochannels with varying interchannel spacing that controlled the degree of channel communication. Instead of treating them as individual channels connected in p...

[Phys. Rev. E 91, 011002(R)] Published Wed Jan 28, 2015

]]>Quantum manifestations of isoperiodic stable structures (QISSs) have a crucial role in the current behavior of quantum dissipative ratchets. In this context, the simple shape of the ISSs has been conjectured to be an almost exclusive feature of the classical system. This has drastic consequences for...

[Phys. Rev. E 91, 010903(R)] Published Mon Jan 26, 2015

]]>In classical statistical mechanics there is a clear correlation between relaxation to equilibrium and chaos. In contrast, for isolated quantum systems this relation is—to say the least—fuzzy. In this work we try to unveil the intricate relation between the relaxation process and the transition from ...

[Phys. Rev. E 91, 010902(R)] Published Fri Jan 23, 2015

]]>A recent and unexpected discrepancy between *ab initio* simulations and the interpretation of a laser shock experiment on aluminum, probed by x-ray Thomson scattering (XRTS), is addressed. The ion-ion structure factor deduced from the XRTS elastic peak (ion feature) is only compatible with a strongly ...

[Phys. Rev. E 91, 011101(R)] Published Tue Jan 20, 2015

]]>We consider different methods, which do not rely on numerical simulations of the percolation process, to approximate percolation thresholds in networks. We perform a systematic analysis on synthetic graphs and a collection of 109 real networks to quantify their effectiveness and reliability as predi...

[Phys. Rev. E 91, 010801(R)] Published Thu Jan 15, 2015

]]>While $ABC$ triblock copolymers are known to form a plethora of dual-mode (i.e., order-on-order) nanostructures, bicomponent $ABA$ triblock copolymers normally self-assemble into single morphologies at thermodynamic incompatibility levels up to the strong-segregation regime. In this study, we employ on-...

[Phys. Rev. E 91, 010601(R)] Published Tue Jan 13, 2015

]]>Models with mixed origins of anomalous subdiffusion have been considered important for understanding transport in biological systems. Here one such mixed model, the quenched-trap model (QTM) on fractal lattices, is investigated. It is shown that both ensemble- and time-averaged mean-square displacem...

[Phys. Rev. E 91, 010102(R)] Published Fri Jan 09, 2015

]]>We show that the mixed phase space dynamics of a typical smooth Hamiltonian system universally leads to a sustained exponential growth of energy at a slow periodic variation of parameters. We build a model for this process in terms of geometric Brownian motion with a positive drift, and relate it to...

[Phys. Rev. E 91, 010901(R)] Published Fri Jan 09, 2015

]]>We study dense and highly polydisperse emulsions at droplet volume fractions $\varphi \ge 0.65$. We apply oscillatory shear and observe droplet motion using confocal microscopy. The presence of droplets with sizes several times the mean size dramatically changes the motion of smaller droplets. Both affine and n...

[Phys. Rev. E 91, 010301(R)] Published Thu Jan 08, 2015

]]>Epilepsy, refractory status epilepticus, and depolarization block are pathological brain activities whose mechanisms are poorly understood. Using a generic mathematical model of seizure activity, we show that these activities coexist under certain conditions spanning the range of possible brain acti...

[Phys. Rev. E 91, 010701(R)] Published Thu Jan 08, 2015

]]>Granular materials often segregate under mechanical agitation such as flowing, shaking, or rotating, in contrast to an expectation of mixing. It is well known that bidisperse mixtures of granular materials in a partially filled rotating cylinder exhibit monotonic coarsening dynamics of segregation. ...

[Phys. Rev. E 91, 010201(R)] Published Wed Jan 07, 2015

]]>In this Rapid Communication, we study the behavior of a strongly diffusive passive scalar field $T$ submitted to a freely decaying, homogeneous and isotropic turbulence with eddy-damped quasinormal Markovian simulations. We present a new subrange located between the ${k}^{-17/3}$ inertial-diffusive subrange ...

[Phys. Rev. E 91, 011001(R)] Published Tue Jan 06, 2015

]]>Domain growth in spinodal decomposition is usually described by a single time-evolving length scale. We show that the evolution of morphology of domains is nonmonotonic. The domains elongate rapidly at first and then, with the help of hydrodynamics, return to a more circular shape. The initial elong...

[Phys. Rev. E 91, 010101(R)] Published Mon Jan 05, 2015

]]>We systematically investigate the spontaneous packaging mechanism of a single polyelectrolyte chain into an oppositely charged nanocavity by Langevin molecular dynamics simulations of a generic coarse-grained model. Intrusion dynamics and packaging rate, as well as the self-assembly process inside t...

[Phys. Rev. E 90, 060601(R)] Published Tue Dec 30, 2014

]]>We consider three-dimensional reshaping of a thin nematoelastic film upon nematic-isotropic transition in the field of a charge one topological defect, leading to either cone or anticone ($d$-cone) shells. The analysis is based on the relation between the shell metric and the tensor order parameter un...

[Phys. Rev. E 90, 060501(R)] Published Mon Dec 22, 2014

]]>Information processing machines at the nanoscales are unavoidably affected by thermal fluctuations. Efficient design requires understanding how nanomachines can operate at minimal energy dissipation. Here we focus on mechanical systems controlled by smoothly varying potential forces. We show that op...

[Phys. Rev. E 90, 060102(R)] Published Mon Dec 15, 2014

]]>We describe direct measurements of the acceleration of an object impacting on a loosely packed granular bed under various pressures, using an instrumented sphere. The sphere acts as a noninvasive probe that measures and continuously transmits the acceleration as it penetrates into the sand, using a ...

[Phys. Rev. E 90, 060201(R)] Published Mon Dec 15, 2014

]]>Using a thermodynamic integration scheme, we compute the excess free energy, $\gamma $, of a glass-forming, binary Lennard-Jones liquid in contact with a frozen amorphous wall, formed by particles frozen into a similar structure as the liquid. We find that $\gamma $ is nonzero, becoming negative at low temperature....

[Phys. Rev. E 90, 060101(R)] Published Fri Dec 12, 2014

]]>We suggest an approach to probing intermittency corrections to the Kolmogorov law in turbulent flows based on the autoregressive moving-average modeling of turbulent time series. We introduce an index ${\rm Y}$ that measures the distance from a Kolmogorov-Obukhov model in the autoregressive moving-average m...

[Phys. Rev. E 90, 061001(R)] Published Wed Dec 03, 2014

]]>We study the Brownian motion of microbeads immersed in water and in a viscoelastic wormlike micelles solution by optical trapping interferometry and diffusing wave spectroscopy. Through the mean-square displacement obtained from both techniques, we deduce the mechanical properties of the fluids at h...

[Phys. Rev. E 90, 060301(R)] Published Tue Dec 02, 2014

]]>We study diffusion on a periodic billiard table with an infinite horizon in the limit of narrow corridors. An effective trapping mechanism emerges according to which the process can be modeled by a Lévy walk combining exponentially distributed trapping times with free propagation along paths whose p...

[Phys. Rev. E 90, 050102(R)] Published Wed Nov 26, 2014

]]>We study the statistics of the condition number $\kappa ={\lambda}_{\mathrm{max}}/{\lambda}_{\mathrm{min}}$ (the ratio between largest and smallest squared singular values) of $N\times M$ Gaussian random matrices. Using a Coulomb fluid technique, we derive analytically and for large $N$ the cumulative $\mathcal{P}(\kappa <x)$ and tail-cumulative $\mathcal{P}(\kappa >x)$ distributions o...

[Phys. Rev. E 90, 050103(R)] Published Wed Nov 26, 2014

]]>The authors propose and analyze a minimal stochastic model that can predict rapid evolution in predator-prey systems. The paper presents simulations that are relevant to a recent experimental study. Their theoretical model should be useful to estimate the risk of extinction and the impact of environmental changes in a number of ecosystems.

[Phys. Rev. E 90, 050702(R)] Published Wed Nov 26, 2014

]]>Although there have been several experimental and numerical works on rapidly rupturing films, measurement of the spatial-temporal temperature during rupturing processes is lacking. Using molecular dynamics simulations, we show that a rupturing film with nanometer thickness generates a non-negligible...

[Phys. Rev. E 90, 051004(R)] Published Mon Nov 24, 2014

]]>We establish experimentally the flow patterns of induced-charge electro-osmosis around immobilized metallic spheres in aqueous electrolyte. The ac field modifies local electrolyte concentration and causes quadrupolar flows with inward velocities being smaller than the outward ones. At high fields, t...

[Phys. Rev. E 90, 051002(R)] Published Fri Nov 21, 2014

]]>We demonstrate that systems with a parameter-controlled inverse cascade can exhibit critical behavior for which at the critical value of the control parameter the inverse cascade stops. In the vicinity of such a critical point, standard phenomenological estimates for the energy balance will fail sin...

[Phys. Rev. E 90, 051003(R)] Published Fri Nov 21, 2014

]]>The x-ray laser-matter interaction for a low-$Z$ material, carbon, is studied with a particle-in-cell code that solves the photoionization and x-ray transport self-consistently. Photoionization is the dominant absorption mechanism and nonthermal photoelectrons are produced with energy near the x-ray p...

[Phys. Rev. E 90, 051102(R)] Published Fri Nov 21, 2014

]]>The ability for reactive constituents to mix is often the key limiting factor for the completion of reactions across a huge range of scales in a variety of media. In flowing systems, deformation and shear enhance mixing by bringing constituents into closer proximity, thus increasing reaction potenti...

[Phys. Rev. E 90, 051001(R)] Published Thu Nov 13, 2014

]]>Understanding the dynamics of human movements is key to issues of significant current interest such as behavioral prediction, recommendation, and control of epidemic spreading. We collect and analyze big data sets of human movements in both cyberspace (through browsing of websites) and physical spac...

[Phys. Rev. E 90, 050802(R)] Published Wed Nov 12, 2014

]]>Fundamental biological processes such as transcription and translation, where a genetic sequence is sequentially read by a macromolecule, have been well described by a classical model of nonequilibrium statistical physics, the totally asymmetric exclusion principle (TASEP). This model describes part...

[Phys. Rev. E 90, 050701(R)] Published Tue Nov 11, 2014

]]>The kinetic origin of grain boundary migration, grain coalescence, and defect reduction in the crystallization of quenched two-dimensional Yukawa liquids are numerically investigated. It is found that, in grain coalescence, stick-slip cracking the region in front of the grain boundary into smaller s...

[Phys. Rev. E 90, 050401(R)] Published Wed Nov 05, 2014

]]>A way to understand thermalization in an isolated system is to interpret it as an increase in entanglement between subsystems. Here we test this idea through a combination of analytical and Krylov-subspace-based numerical methods applied to a quantum gas of bosons. We find that the entanglement entr...

[Phys. Rev. E 90, 050101(R)] Published Mon Nov 03, 2014

]]>Colloidal systems are considered good models of molecular glasses and we further explore the range of validity of this paradigm using a thermosensitive core-shell particle dispersion to study the aging response of a colloidal glass subsequent to both shear-melting and temperature (concentration)-jum...

[Phys. Rev. E 90, 050301(R)] Published Mon Nov 03, 2014

]]>Power-law distributions are typical macroscopic features occurring in almost all complex systems observable in nature. As a result, researchers in quantitative analyses must often generate random synthetic variates obeying power-law distributions. The task is usually performed through standard metho...

[Phys. Rev. E 90, 050801(R)] Published Mon Nov 03, 2014

]]>The mechanism of subnanosecond current front rise observed previously in the experiment in high-voltage pulse open discharge in helium is studied in kinetic particle-in-cell simulations. The Boltzmann equations for electrons, ions, and fast atoms are solved self-consistently with the Poisson equatio...

[Phys. Rev. E 90, 051101(R)] Published Mon Nov 03, 2014

]]>The frequency spectra of the entropy and kinetic energy along with the power spectrum of the thermal flux are computed from direct numerical simulations for turbulent Rayleigh-Bénard convection with uniform rotation about a vertical axis in low-Prandtl-number fluids $\left(\mathrm{Pr}<0.6\right)$. Simulations are done...

[Phys. Rev. E 90, 041004(R)] Published Fri Oct 31, 2014

]]>We compute the full order statistics of a one-dimensional gas of spinless fermions (or, equivalently, hard bosons) in a harmonic trap at zero temperature, including its large deviation tails. The problem amounts to computing the probability distribution of the $k\mathrm{th}$ smallest eigenvalue ${\lambda}_{\left(k\right)}$ of a large...

[Phys. Rev. E 90, 040102(R)] Published Thu Oct 30, 2014

]]>We report a systematic study of the ejected charge dynamics surrounding laser-produced 30-nm warm dense gold films using single-shot femtosecond electron shadow imaging and deflectometry. The results reveal a two-step dynamical process of the ejected electrons under high pump fluence conditions: an ...

[Phys. Rev. E 90, 041102(R)] Published Fri Oct 24, 2014

]]>We present comprehensive molecular dynamics results for phase-separation kinetics of fluids in a porous medium. This system is modeled by a symmetric Lennard-Jones fluid mixture with a quenched random field. The presence of disorder slows down domain growth from power-law to a logarithmic form. It a...

[Phys. Rev. E 90, 040302(R)] Published Wed Oct 22, 2014

]]>Ensemble-averaged high resolution direct numerical simulations of reverse spectral transfer are presented, extending on the many single realization numerical studies done up to now. This identifies this type of spectral transfer as a statistical property of magnetohydrodynamic turbulence and thus pe...

[Phys. Rev. E 90, 041003(R)] Published Wed Oct 22, 2014

]]>Using numerical simulations, the onset of Poiseuille flow in a confined soft glass is investigated. Starting from the quiescent state, steady flow sets in at a time scale which increases with a decrease in applied forcing. At this onset time scale, a rapid transition occurs via the simultaneous flui...

[Phys. Rev. E 90, 040301(R)] Published Mon Oct 20, 2014

]]>The driving mechanism and the swirl direction of the bathtub vortex are investigated by the linear stability analysis of the no-vortex flow as well as numerical simulations. We find that only systems having plane symmetries with respect to vertical planes deserve research for the swirl direction. Th...

[Phys. Rev. E 90, 041002(R)] Published Fri Oct 17, 2014

]]>Two-dimensional hybrid simulations of super-Alfvénic expanding debris plasma interacting with an inhomogeneous ambient plasma are presented. The simulations demonstrate improved collisionless coupling of energy to the ambient ions when encountering a density gradient. Simulations of an expanding cyl...

[Phys. Rev. E 90, 041101(R)] Published Fri Oct 17, 2014

]]>A simple reaction-diffusion-advection equation is proposed in a dichotomous tree network to discuss an optimal network. An optimal size ratio $r$ is evaluated by the principle of maximization of total reaction rate. In the case of reaction-limited conditions, the optimal ratio can be larger than ${(1/2)}^{\mathrm{...}}$

[Phys. Rev. E 90, 040801(R)] Published Fri Oct 10, 2014

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