We investigate the microresponse of the quasi-two-dimensional dusty plasma liquid around freezing to the shear force from a laser beam through the center of the liquid cluster. It is found that the cold liquid can be viewed as a patchwork of crystalline ordered domains (CODs) which are solidlike but...

[Phys. Rev. E 89, 041102] Published Mon Apr 21, 2014

]]>Reaction fronts evolving in a porous medium exhibit a rich dynamical behavior. In the presence of an adverse flow, experiments show that the front slows down and eventually gets pinned, displaying a particular sawtooth shape. Extensive numerical simulations of the hydrodynamic equations confirm the ...

[Phys. Rev. E 89, 041004] Published Fri Apr 18, 2014

]]>We derive an exact equation governing two-particle backwards mean-squared dispersion for both deterministic and stochastic tracer particles in turbulent flows. For the deterministic trajectories, we probe the consequences of our formula for short times and arrive at approximate expressions for the m...

[Phys. Rev. E 89, 041003] Published Thu Apr 17, 2014

]]>We report a combined dynamic light scattering and neutron spin-echo (NSE) study on vesicles composed of the phospholipid 1,2-dimyristoyl-sn-glycero-3-phosphatidylcholine under the influence of varying amounts of perfluorooctanoic acid. We study local lipid bilayer undulations using NSE on time scale...

[Phys. Rev. E 89, 040702] Published Thu Apr 17, 2014

]]>We study the dynamics of high-order rogue waves (RWs) in two-component coupled nonlinear Schrödinger equations. We find that four fundamental rogue waves can emerge from second-order vector RWs in the coupled system, in contrast to the high-order ones in single-component systems. The distribution sh...

[Phys. Rev. E 89, 041201] Published Thu Apr 10, 2014

]]>Nonlinear dynamics of surface gravity waves trapped by an opposing jet current is studied analytically and numerically. For wave fields narrow band in frequency but not necessarily with narrow angular distributions the developed asymptotic weakly nonlinear theory based on the modal approach of Shrir...

[Phys. Rev. E 89, 041002] Published Wed Apr 09, 2014

]]>In a recent paper [Mandal et al., Phys. Rev. E 88, 022129 (2013)], the nature of spatial correlations of plasticity in hard-sphere glasses was addressed both via computer simulations and in experiments. It was found that the experimentally obtained correlations obey a power law, whereas the correla...

[Phys. Rev. E 89, 040301] Published Wed Apr 09, 2014

]]>We present a theory of turbulent elasticity, a property of drift-wave–zonal-flow (DW-ZF) turbulence, which follows from the time delay in the response of DWs to ZF shears. An emergent dimensionless parameter |〈v〉′|/Δωk is found to be a measure of the degree of Fickian flux-gradient relation breaking...

[Phys. Rev. E 89, 041101] Published Fri Apr 04, 2014

]]>Recent numerical simulations have shown the strong impact of helicity on homogeneous rotating hydrodynamic turbulence. The main effect can be summarized through the law n+ñ=−4, where n and ñ are the power law indices of the one-dimensional energy and helicity spectra, respectively. We investigate ...

[Phys. Rev. E 89, 041001] Published Wed Apr 02, 2014

]]>Morphologies of a double-bilayer vesicle were explored experimentally by fast confocal laser microscopy and numerically by a dynamically triangulated membrane model with area-difference elasticity. The confinement was found to induce several shapes of the inner vesicles that had not been observed in...

[Phys. Rev. E 89, 040701] Published Tue Apr 01, 2014

]]>Probing deeper into the existing issues regarding the exit probability (EP) in one-dimensional dynamical models, we consider several models where the states are represented by Ising spins and the information flows inwards. At zero temperature, these systems evolve to either of two absorbing states. ...

[Phys. Rev. E 89, 030103] Published Mon Mar 31, 2014

]]>Diffusion in nonhomogeneous media is described by a dynamical process driven by a general Lévy noise and subordinated to a random time; the subordinator depends on the position. This problem is approximated by a multiplicative process subordinated to a random time: it separately takes into account e...

[Phys. Rev. E 89, 030102] Published Mon Mar 31, 2014

]]>The translocation time of a polymer through a pore under the influence of an external field depends on a number of parameters, the most important of which are the field strength, the interaction with the pore, and the confinement entropy. Experimentally, the translocation is dominated either by the ...

[Phys. Rev. E 89, 030601] Published Fri Mar 28, 2014

]]>We present a continuum theoretical model describing the impact of chirality on nematic systems with large flexoelectricity. As opposed to achiral materials, where only one type of the modulated structure can exist in a given material, the model predicts that chirality can stabilize several modulated...

[Phys. Rev. E 89, 030501] Published Wed Mar 26, 2014

]]>We propose a method to reconstruct the density of a luminescent source in a highly scattering medium from ultrasound-modulated optical measurements. Our approach is based on the solution to a hybrid inverse source problem for the diffusion equation.

[Phys. Rev. E 89, 031201] Published Thu Mar 13, 2014

]]>The spatial expansion of a population in a nonuniform environment may benefit from phenotypic heterogeneity with interconverting subpopulations using different survival strategies. We analyze the crossing of an antibiotic-containing environment by a bacterial population consisting of rapidly growing...

[Phys. Rev. E 89, 030702] Published Wed Mar 12, 2014

]]>We describe a general simulation scheme for assessing the thermodynamic consequences of neglecting many-body effects in coarse-grained models of complex fluids. The method exploits the fact that the asymptote of a simple-to-measure structural function provides direct estimates of virial coefficients...

[Phys. Rev. E 89, 031301] Published Mon Mar 10, 2014

]]>A wide range of networked systems exhibit highly connected nodes (hubs) as prominent structural elements. The functional roles of hubs in the collective nonlinear dynamics of many such networks, however, are not well understood. Here, we propose that hubs in neural circuits may activate local signal...

[Phys. Rev. E 89, 030701] Published Mon Mar 10, 2014

]]>Three-dimensional fast magnetic reconnection driven by two ultraintense femtosecond laser pulses is investigated by relativistic particle-in-cell simulation, where the two paralleled incident laser beams are shot into a near-critical plasma layer to form a magnetic reconnection configuration in self...

[Phys. Rev. E 89, 031101] Published Fri Mar 07, 2014

]]>Activated escape of a Brownian particle from the domain of attraction of a stable focus over a limit cycle exhibits non-Kramers behavior: it is non-Poissonian. When the attractor is moved closer to the boundary, oscillations can be discerned in the survival probability. We show that these oscillatio...

[Phys. Rev. E 89, 030101] Published Fri Mar 07, 2014

]]>A key open question in the glass transition field is whether a finite temperature thermodynamic transition to the glass state exists or not. Recent simulations of coupled replicas in atomistic models have found signatures of a static transition as a function of replica coupling. This can be viewed a...

[Phys. Rev. E 89, 030301] Published Mon Mar 03, 2014

]]>The problem of stochastic advection of passive particles by circulating conserved flows on networks is formulated and investigated. The particles undergo transitions between the nodes, with the transition rates determined by the flows passing through the links. Such stochastic advection processes le...

[Phys. Rev. E 89, 020801] Published Fri Feb 28, 2014

]]>We show results of our high force (up to 1.8 nN) atomic force microscopy force spectroscopy measurements of a double stranded DNA. We have found that the force spectra of torsionally constrained molecules display a small plateau occurring at a force of approximately 1 nN. This transition is absent i...

[Phys. Rev. E 89, 020701] Published Thu Feb 27, 2014

]]>We report a molecular dynamics simulation demonstrating a fast spontaneous liquid-liquid phase separation of water and a subsequent slow crystallization to ice. It is found that supercooled water separates rapidly into low- and high-density domains so as to reduce the surface energy in the rectangul...

[Phys. Rev. E 89, 020301] Published Tue Feb 25, 2014

]]>Experiments in a modified Taylor-Couette device, spanning Reynolds numbers of 105 to greater than 106, reveal the nonlinear stability of astrophysically relevant flows. Nearly ideal rotation, expected in the absence of axial boundaries, is achieved for a narrow range of operating parameters. Departu...

[Phys. Rev. E 89, 021004] Published Mon Feb 24, 2014

]]>Concentrated suspensions may shear thin when the suspended particles form planar sheets that slide over one another with less friction than if the particles are randomly distributed. In a naive model the suspension is described by a mean effective viscosity and particles that collide with each other...

[Phys. Rev. E 89, 021003] Published Fri Feb 21, 2014

]]>Implications of the recently discovered effect of channeling of upstream extra particles for transport phenomena in a two-dimensional plasma crystal are discussed. Upstream particles levitated above the lattice layer and tended to move between the rows of lattice particles. An example of heat transp...

[Phys. Rev. E 89, 021101] Published Wed Feb 19, 2014

]]>Strongly confined active liquids are subject to unique hydrodynamic interactions due to momentum screening and lubricated friction by the confining walls. Using numerical simulations, we demonstrate that two-dimensional dilute suspensions of fore-aft asymmetric polar swimmers in a Hele-Shaw geometry...

[Phys. Rev. E 89, 021002] Published Wed Feb 19, 2014

]]>We study the statistical properties of orientation and rotation dynamics of elliptical tracer particles in two-dimensional, homogeneous, and isotropic turbulence by direct numerical simulations. We consider both the cases in which the turbulent flow is generated by forcing at large and intermediate ...

[Phys. Rev. E 89, 021001] Published Wed Feb 19, 2014

]]>Highly engineered materials are arousing great interest because of their ability to manipulate heat, as described by the coordinate transformation approach. Based on recently developed analog gravity models, we present how a simple device based on nematic liquid crystals can achieve in principle eit...

[Phys. Rev. E 89, 020501] Published Wed Feb 19, 2014

]]>A logarithmic oscillator has the outstanding property that the expectation value of its kinetic energy is constant for all stationary states. Recently the ansatz that this property can be used to define a Hamiltonian thermostat has been put forward and a suggestion has been made that this logarithmi...

[Phys. Rev. E 89, 021301] Published Tue Feb 18, 2014

]]>We present a powerful semiclassical expression to evaluate off-diagonal matrix elements of the evolution operator between quantum states constructed in the neighborhood of unstable short periodic orbits, which is valid up to the Heisenberg time. The expression is much easier to evaluate than the Van...

[Phys. Rev. E 89, 020901] Published Tue Feb 18, 2014

]]>A gas of inelastic rough spheres admits a spatially homogeneous base state which turns into a hydrodynamic state after a finite relaxation time. We show that this relaxation time is hardly dependent on the degree of inelasticity but increases dramatically with decreasing roughness. An accurate descr...

[Phys. Rev. E 89, 020202] Published Tue Feb 18, 2014

]]>The dynamics of an electron in a strong laser field can be significantly altered by radiation reaction. This usually results in a strongly damped motion, with the electron losing a large fraction of its initial energy. Here we show that the electron dynamics in a bichromatic laser pulse can be indir...

[Phys. Rev. E 89, 021201] Published Mon Feb 10, 2014

]]>A linear stability analysis of the Navier-Stokes (NS) granular hydrodynamic equations is performed to determine the critical length scale for the onset of vortices and clusters instabilities in granular dense binary mixtures. In contrast to previous attempts, our results (which are based on the solu...

[Phys. Rev. E 89, 020201] Published Mon Feb 10, 2014

]]>Using the ferroin- and the bathoferroin-catalyzed Belousov-Zhabotinsky (BZ) reaction embedded in the sodium-bis (2-ethylhexyl) sulfosuccinate (AOT) water-in-oil microemulsion, we observed different patterns occurring in two different solvents, hexane and octane. Turing patterns were found in both so...

[Phys. Rev. E 89, 010902] Published Thu Jan 30, 2014

]]>Many structural properties of conventional passive materials are known to arise from the symmetries of their microscopic constituents. By contrast, it is largely unclear how the interplay between particle shape and self-propulsion controls the meso- and macroscale behavior of active matter. Here we ...

[Phys. Rev. E 89, 010302] Published Tue Jan 28, 2014

]]>Cells often exhibit different and stable phenotypes from the same DNA sequence. Robustness and plasticity of such cellular states are controlled by diverse transcriptional and epigenetic mechanisms, among them the modification of biochemical marks on chromatin. Here, we develop a stochastic model th...

[Phys. Rev. E 89, 010701] Published Thu Jan 23, 2014

]]>We provide an experimental proof of concept for a robust, continuously rotating microstructure—consisting of two metallodielectric (gold-polystyrene) Janus particles rigidly attached to each other—which is driven in uniform ac fields by asymmetric induced-charge electro-osmosis. The pairs (doublets)...

[Phys. Rev. E 89, 011003] Published Thu Jan 16, 2014

]]> Using molecular dynamics simulations of UO_{2}—a type II superionic conductor—we identify a well-defined onset of dynamic disorder (T_{α}), which is remarkably correlated to a nontrivial advance of dynamical heterogeneity (DH). Quantified by the correlations in the dynamic propensity and van Hove self-cor...

[Phys. Rev. E 89, 010301] Published Thu Jan 16, 2014

]]>Motivated by the recent exact solution of the stationary-state Kardar-Parisi-Zhang (KPZ) statistics by Imamura and Sasamoto [Phys. Rev. Lett. 108, 190603 (2012)PRLTAO10.1103/PhysRevLett.108.190603], as well as a precursor experimental signature unearthed by Takeuchi [Phys. Rev. Lett. 110, 210604 (20...

[Phys. Rev. E 89, 010103] Published Thu Jan 16, 2014

]]>We derive the Kuramoto-Sivashinsky-type phase equation from the Kuramoto-Sakaguchi-type phase model via the Ott-Antonsen-type complex amplitude equation and demonstrate heterogeneity-induced collective-phase turbulence in nonlocally coupled individual-phase oscillators.

[Phys. Rev. E 89, 010901] Published Mon Jan 13, 2014

]]>We consider the Kardar-Parisi-Zhang equation for a circular interface in two dimensions, unconstrained by the standard small-slope and no-overhang approximations. Numerical simulations using an adaptive scheme allow us to elucidate the complete time evolution as a crossover between a short-time regi...

[Phys. Rev. E 89, 010401] Published Mon Jan 13, 2014

]]>We study the nonequilibrium critical behavior of the pair contact process with diffusion (PCPD) by means of nonperturbative functional renormalization group techniques. We show that usual perturbation theory fails because the effective potential develops a nonanalyticity at a finite length scale: Pe...

[Phys. Rev. E 89, 010102] Published Mon Jan 13, 2014

]]>The dynamics of surface gravity water waves can be described by the self-defocusing nonlinear Schrödinger equation. Recent observations of black solitons on the surface of water confirmed its validity for finite, below critical depth. The black soliton is a limiting case of a family of gray soliton ...

[Phys. Rev. E 89, 011002] Published Fri Jan 10, 2014

]]>We use the macroscopic fluctuation theory (MFT) to study large current fluctuations in nonstationary diffusive lattice gases. We identify two universality classes of these fluctuations, which we call elliptic and hyperbolic. They emerge in the limit when the deterministic mass flux is small compared...

[Phys. Rev. E 89, 010101] Published Fri Jan 10, 2014

]]>The self-assembly of spherical magnets (magnetic balls) is addressed theoretically. Minimal energy structures are obtained by optimization procedures as well as Monte Carlo computer simulations. Three typical shapes are obtained depending on the number of constitutive magnets N. In the regime of sma...

[Phys. Rev. E 89, 011202] Published Thu Jan 09, 2014

]]>Exact explicit rogue-wave solutions of intricate structures are presented for the long-wave–short-wave resonance equation. These vector parametric solutions feature coupled dark- and bright-field counterparts of the Peregrine soliton. Numerical simulations show the robustness of dark and bright rogu...

[Phys. Rev. E 89, 011201] Published Mon Jan 06, 2014

]]>We present magneto-optical measurements on two liquid crystals that exhibit a wide temperature-range amorphous blue phase (BPIII). Magnetic fields up to 25 T are found to suppress the onset of BPIII in both materials by almost 1 °C. This effect appears to increase nonlinearly with the field strength...

[Phys. Rev. E 89, 010501] Published Mon Jan 06, 2014

]]>The Taylor-Couette flow of a dilute micellar system known to generate shear-induced structures is investigated through simultaneous rheometry and ultrasonic imaging. We show that flow instabilities must be taken into account since both Reynolds and Weissenberg numbers may be large. Before nucleation...

[Phys. Rev. E 89, 011001] Published Thu Jan 02, 2014

]]>We present a method that optimizes the aspect ratio of a spatially anisotropic quantum lattice model during the quantum Monte Carlo simulation, and realizes the virtually isotropic lattice automatically. The anisotropy is removed by using the Robbins-Monro algorithm based on the correlation length i...

[Phys. Rev. E 88, 061301] Published Mon Dec 30, 2013

]]>When a drop impacts a pool of liquid it entraps a thin disk of air under its center. This disk contracts rapidly into a bubble to minimize surface energy. Herein we use ultra-high-speed imaging to measure the contraction speed of this disk when the drop and pool are of different liquids. For miscibl...

[Phys. Rev. E 88, 061001] Published Tue Dec 17, 2013

]]>Transport properties in random and scale-free (SF) networks are studied by analyzing the betweenness centrality (BC) distribution P(B) in the minimum spanning trees (MSTs) and infinite incipient percolation clusters (IIPCs) of the networks. It is found that P(B) in MSTs scales as P(B)∼B−δ. The obtai...

[Phys. Rev. E 88, 060802] Published Tue Dec 17, 2013

]]>We have analyzed the detectability limits of network communities in the framework of the popular Girvan and Newman benchmark. By carefully taking into account the inevitable stochastic fluctuations that affect the construction of each and every instance of the benchmark, we come to the conclusion th...

[Phys. Rev. E 88, 060801] Published Thu Dec 12, 2013

]]>Interfacial flows close to a moving contact line are inherently multiscale. The shape of the interface and the flow at meso- and macroscopic scales inherit an apparent interface slope and a regularization length, both named after Voinov, from the microscopic inner region. Here, we solve the inner pr...

[Phys. Rev. E 88, 060404] Published Thu Dec 12, 2013

]]>Spectra of ordered eigenvalues of finite random matrices are interpreted as a time series. Data-adaptive techniques from signal analysis are applied to decompose the spectrum in clearly differentiated trend and fluctuation modes, avoiding possible artifacts introduced by standard unfolding technique...

[Phys. Rev. E 88, 060902] Published Tue Dec 10, 2013

]]>The strength and stability of frictional interfaces, ranging from tribological systems to earthquake faults, are intimately related to the underlying spatially extended dynamics. Here we provide a comprehensive theoretical account, both analytic and numeric, of spatiotemporal interfacial dynamics in...

[Phys. Rev. E 88, 060403] Published Tue Dec 10, 2013

]]>Using experiments with single-particle resolution and computer simulations we study the collective behavior of multiple vacancies injected into two-dimensional crystals. We find that the defects assemble into linear strings, terminated by dislocations with antiparallel Burgers vectors. We show that ...

[Phys. Rev. E 88, 060402] Published Tue Dec 10, 2013

]]>A synergetic control technique for stabilizing a priori unknown saddle steady states of dynamical systems is described. The method involves an unstable filter technique combined with a derivative feedback. The cut-off frequency of the filter is not limited by the damping of the system, and therefore...

[Phys. Rev. E 88, 060901] Published Fri Dec 06, 2013

]]>A phase-field model of a crack front propagating in a three-dimensional brittle material is used to study the fractographic patterns induced by the branching instability. The numerical results of this model give rise to crack surfaces that are similar to those obtained in various experimental situat...

[Phys. Rev. E 88, 060401] Published Fri Dec 06, 2013

]]>One major goal in condensed matter is identifying the physical mechanisms that lead to arrested states of matter, especially gels and glasses. The complex nature and microscopic details of each particular system are relevant. However, from both scientific and technological viewpoints, a general, con...

[Phys. Rev. E 88, 060302] Published Fri Dec 06, 2013

]]>We develop a classical density functional theory (DFT) for two-site associating fluids in spatially homogeneous external fields which exhibit orientational inhomogeneities. The Helmholtz free-energy functional is obtained using Wertheim's thermodynamic perturbation theory and the orientational distr...

[Phys. Rev. E 88, 060301] Published Mon Dec 02, 2013

]]>In this Rapid Communication we show that the interplay between the deformation geometric-nonlinearity and distributions of external charges and dipoles lead to the renormalization of the membrane's native flexoelectric response. Our work provides a framework for a mesoscopic interpretation of flexoe...

[Phys. Rev. E 88, 050701] Published Tue Nov 26, 2013

]]>We synthesize colloidal particles with various anisotropic shapes and track their orientationally resolved Brownian trajectories using confocal microscopy. An analysis of appropriate short-time correlation functions provides direct access to the hydrodynamic friction tensor of the particles revealin...

[Phys. Rev. E 88, 050301] Published Fri Nov 22, 2013

]]>We demonstrate by quantitative experimental measurements that metamaterials with anisotropic properties can be used in the context of water waves to produce a reflectionless bent waveguide. The anisotropic medium consists in a bathymetry with subwavelength layered structure that shifts the wave in t...

[Phys. Rev. E 88, 051002] Published Tue Nov 19, 2013

]]>Many real-world networks depend on other networks, often in nontrivial ways, to maintain their functionality. These interdependent “networks of networks” are often extremely fragile. When a fraction 1−p of nodes in one network randomly fails, the damage propagates to nodes in networks that are inter...

[Phys. Rev. E 88, 050803] Published Fri Nov 15, 2013

]]>We consider the shear rheology of concentrated suspensions of non-Brownian frictional particles. The key result of our study is the emergence of a pronounced shear-thickening regime, where frictionless particles would normally undergo shear thinning. We can clarify that shear thickening in our simul...

[Phys. Rev. E 88, 050201] Published Thu Nov 14, 2013

]]>We introduce a class of networks that grow by enhanced redirection. Nodes are introduced sequentially, and each either attaches to a randomly chosen target node with probability 1−r or to the parent of the target with probability r, where r is an increasing function of the degree of the parent. This...

[Phys. Rev. E 88, 050802] Published Tue Nov 12, 2013

]]> We examine the initial dynamical behavior of dissolving microbubbles composed of carbon dioxide gas in highly viscous silicone oils over a range of flow rates and pressure conditions. Microfluidic periodic trains of CO_{2} bubbles are used to probe the interrelation between bubble dissolution and high-...

[Phys. Rev. E 88, 051001] Published Fri Nov 08, 2013

]]>Amplitude death (AD) and oscillation death (OD) are two structurally different oscillation quenching types in coupled nonlinear oscillators. The transition from AD to OD has been recently realized due to the interplay between heterogeneity and coupling strength [ A. Koseska et al. Phys. Rev. Lett. ...

[Phys. Rev. E 88, 050901] Published Thu Nov 07, 2013

]]>We develop a theoretical framework for the study of epidemiclike social contagion in large scale social systems. We consider the most general setting in which different communication platforms or categories form multiplex networks. Specifically, we propose a contact-based information spreading model...

[Phys. Rev. E 88, 050801] Published Wed Nov 06, 2013

]]>Defect dynamics in a thin active nematic layer is studied by asymptotic matching of solutions in the defect core and the far field. The analysis is facilitated by the correspondence between the two-dimensional nematic and complex scalar field models. Self-propulsion and topological interactions are ...

[Phys. Rev. E 88, 050502] Published Wed Nov 06, 2013

]]>Novel dynamic experiments have enabled the identification of a macroscopic solidlike response in the isotropic phase of a low molecular weight liquid crystal, 4,4'-n-octylcyanobiphenyl (8CB). This unknown property indicates that the low frequency shear elasticity identified in the isotropic phase of...

[Phys. Rev. E 88, 050501] Published Wed Nov 06, 2013

]]>Dynamical quorum sensing, the population based phenomenon, is believed to occur when the elements of a system interact via dynamic coupling. In the present work, we demonstrate an alternate scenario, involving static coupling, that could also lead to quorum sensing behavior. These static and dynamic...

[Phys. Rev. E 88, 040903] Published Tue Oct 29, 2013

]]>Delay-coupled networks are investigated with nonidentical delay times and the effects of such heterogeneity on the emergent dynamics of complex systems are characterized. A simple decomposition method is presented that decouples the dynamics of the network into node-size modal equations in the vicin...

[Phys. Rev. E 88, 040902] Published Tue Oct 29, 2013

]]>We show, using differential dynamic microscopy, that the diffusivity of nonmotile cells in a three-dimensional (3D) population of motile E. coli is enhanced by an amount proportional to the active cell flux. While nonmotile mutants without flagella and mutants with paralyzed flagella have quite diff...

[Phys. Rev. E 88, 041002] Published Mon Oct 28, 2013

]]>We study the dependence of the largest component in regular networks on the clustering coefficient, showing that its size changes smoothly without undergoing a phase transition. We explain this behavior via an analytical approach based on the network structure, and provide an exact equation describi...

[Phys. Rev. E 88, 040801] Published Fri Oct 25, 2013

]]>Nematic elastomers contract along their director when heated or illuminated (in the case of photoelastomers). We present a conceptual design for an elastomer-based engine to extract mechanical work from heat or light. The material parameters and the geometry of such an engine are explored, and it is...

[Phys. Rev. E 88, 040501] Published Thu Oct 24, 2013

]]>We investigate how nonspecific interactions and unbinding-rebinding events give rise to a length- and conformation-dependent enhancement of the “macroscopic” dissociation time of proteins from a DNA, or in general for the release of ligands initially bound to a long polymer. By numerically simulatin...

[Phys. Rev. E 88, 040703] Published Wed Oct 23, 2013

]]>We present the results of exact numerical studies of the energy landscape and the dynamics of a 12-monomer chain with contact interactions encoding the ground state on a square lattice. In spite of its simplicity, the model is shown to exhibit behavior at odds with the standard picture of proteins.

[Phys. Rev. E 88, 040702] Published Tue Oct 22, 2013

]]>A general formalism is developed to construct a Markov chain model that converges to a one-dimensional map in the infinite population limit. Stochastic fluctuations are therefore internal to the system and not externally specified. For finite populations an approximate Gaussian scheme is devised to ...

[Phys. Rev. E 88, 040102] Published Tue Oct 22, 2013

]]>We solve an inverse problem for fluid particle pair statistics: we show that a time sequence of probability density functions (PDFs) of separations can be exactly reproduced by solving the diffusion equation with a suitable time-dependent diffusivity. The diffusivity tensor is given by a time integr...

[Phys. Rev. E 88, 041001] Published Mon Oct 21, 2013

]]>We investigate the diffusive motion of micron-sized spherical tracers in a viscoelastic actin filament network over the time span of 8 orders of magnitude using optical-tweezers single-particle tracking. The hydrodynamic interactions of a tracer with the surrounding fluid are shown to dominate at mi...

[Phys. Rev. E 88, 040701] Published Mon Oct 21, 2013

]]>Consider a dynamical many-body system with a random initial state subsequently evolving through stochastic dynamics. What is the relative importance of the initial state (“nature”) versus the realization of the stochastic dynamics (“nurture”) in predicting the final state? We examined this question ...

[Phys. Rev. E 88, 040101] Published Mon Oct 21, 2013

]]>An instability near the transition to collective motion of self-propelled particles is studied numerically by Enskog-like kinetic theory. While hydrodynamics breaks down, the kinetic approach leads to steep solitonlike waves. These supersonic waves show hysteresis and lead to an abrupt jump of the g...

[Phys. Rev. E 88, 040303] Published Fri Oct 18, 2013

]]>Phase separation in binary mixtures in the presence of Janus particles has been studied in terms of a Cahn-Hilliard model coupled to the Langevin equations describing the particle dynamics. We demonstrate that the phase separation process is arrested leading to unexpected regular stripe patterns in ...

[Phys. Rev. E 88, 040302] Published Mon Oct 14, 2013

]]>Magnetoelectric coupling—the ability of a material to magnetize upon application of an electric field and, conversely, to polarize under the action of a magnetic field—is rare and restricted to a rather small set of exotic hard crystalline materials. Intense research activity has recently ensued on ...

[Phys. Rev. E 88, 040601] Published Thu Oct 10, 2013

]]>We have developed an analytical physics model from fundamental physics principles and used the reduced one-dimensional model to derive a thermonuclear ignition criterion and implosion energy scaling laws applicable to inertial confinement fusion capsules. The scaling laws relate the fuel pressure an...

[Phys. Rev. E 88, 041101] Published Mon Oct 07, 2013

]]>A confined colloidal glass, under the imposition of a uniform shear stress, is investigated using numerical simulations. Both at macro- and microscales, the consequent dynamics during the onset of flow is studied. When the imposed stress is gradually decreased, the time scale for the onset of steady...

[Phys. Rev. E 88, 040301] Published Mon Oct 07, 2013

]]>We numerically performed a way to produce a supratransmission phenomenon in the Salerno equation describing the dynamics of modulated waves in a discrete nonlinear transmission lattice. For the natural supratransmission phenomenon, there exists a threshold of amplitude for which energy can flow in t...

[Phys. Rev. E 88, 040901] Published Wed Oct 02, 2013

]]>We performed a parametric study of the drag on vertical intruders with uniform cross sections of different sizes and shapes, from which we developed a semiempirical model. Baffling techniques were used to isolate the contributions of the intruder's different subsurfaces, and we observed size effects...

[Phys. Rev. E 88, 030201] Published Mon Sep 30, 2013

]]>We consider the classical problem of kinematic dynamo action in simple steady flows. Due to the adjointness of the induction operator, we show that the growth rate of the dynamo will be exactly the same for two types of magnetic boundary conditions: the magnetic field can be normal (infinite magneti...

[Phys. Rev. E 88, 031001] Published Tue Sep 24, 2013

]]> A surprising observation in dusty plasma experiments is that the dust thermal energy density, P_{d} ∝ n_{d}T_{d}, is typically much greater than n_{d}T_{n} (where n_{d} and T_{d} are the dust density and temperature, and T_{n} is the neutral temperature), even though the dust particles would be expected to be in thermal eq...

[Phys. Rev. E 88, 031101] Published Mon Sep 23, 2013

]]>Accurate localization of the epileptic seizure onset zones (SOZs) is crucial for successful surgery, which usually depends on the information obtained from intracranial electroencephalography (IEEG) recordings. The visual criteria and univariate methods of analyzing IEEG recordings have not always p...

[Phys. Rev. E 88, 030701] Published Thu Sep 19, 2013

]]>The six-vertex model on a square lattice is “exactly solvable” because an exact formula for the free energy can be obtained by the Bethe ansatz. However, exact formulas for the correlations of local bulk observables, such as the orientation of the arrow at a given edge, are, in general, not availabl...

[Phys. Rev. E 88, 030103] Published Mon Sep 16, 2013

]]>The adaptive voter model is a paradigmatic model in the study of opinion formation. Here we propose an extension for this model, in which conflicts are resolved by obtaining another opinion, and analytically study the time required for consensus to emerge. Our results shed light on the rich phenomen...

[Phys. Rev. E 88, 030102] Published Fri Sep 06, 2013

]]> We show both analytically and numerically that there is an infinite number of flat bands with different Chern numbers in a two-dimensional magnetic photonic crystal at nearly the same frequency determined by the condition that the effective magnetic permeability μ_{eff}≈−1. This opens the door to explo...

[Phys. Rev. E 88, 031201] Published Thu Sep 05, 2013

]]>Critical wetting transition for short-range forces in three dimensions (d=3) is reinvestigated by means of Monte Carlo simulation. Using an anisotropic finite size scaling approach, as well as approaches that do not rely on finite size scaling, we show that the critical wetting transition shows clea...

[Phys. Rev. E 88, 030401] Published Thu Sep 05, 2013

]]>Building on insights from the theory of integrable lattices, the integrability is claimed for nonlinear replica σ models derived in the context of real symmetric random matrices. Specifically, the fermionic and the bosonic replica partition functions are proven to form a single (supersymmetric) Pfaf...

[Phys. Rev. E 88, 030101] Published Thu Sep 05, 2013

]]>We measure all nonzero elements of the three-dimensional diffusion tensor D for clusters of colloidal spheres to a precision of 1% or better using digital holographic microscopy. We study both dimers and triangular trimers of spheres, for which no analytical calculations of the diffusion tensor exis...

[Phys. Rev. E 88, 020302] Published Fri Aug 30, 2013

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