Article
Chemistry, Physical
Jens Bickmann, Stephan Broeker, Julian Jeggle, Raphael Wittkowski
Summary: We consider chirality in active systems by studying the phase behavior of planar systems of interacting Brownian circle swimmers. We derive a predictive field theory that describes the collective dynamics of the circle swimmers and predict the suppression of motility-induced phase separation by the angular propulsion of the particles.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Mathematics, Applied
S. Curilef, A. R. Plastino, R. S. Wedemann
Summary: This article discusses the study of many-body systems described by nonlinear Fokker-Planck equations and their behavior under time-dependent external forces. The research provides valuable insights on various physical problems, such as the dynamics of interacting vortices in superconductors.
Article
Physics, Multidisciplinary
Sophie Marbach, Miranda Holmes-Cerfon
Summary: Inertia generally does not affect the long-time diffusion of passive overdamped particles in fluids. However, a model predicts that particles coated with ligands that bind reversibly to surface receptors diffuse more slowly if they are heavy compared to particles of the same size.
PHYSICAL REVIEW LETTERS
(2022)
Article
Engineering, Mechanical
Cheng Ma, Ruibin Ren, Maokang Luo, Ke Deng
Summary: This paper investigates a linear oscillator subject to multiplicative Gaussian white noise in both frequency and input signal fluctuation. The focus of the study is the stochastic resonance (SR). By utilizing the properties of Brownian motion and Ito formula, the analytical expressions of both the first-order and second-order moments of the system's steady response are derived. The signal-to-noise ratio is introduced to analyze the impact of fluctuation in the system. It is noteworthy that the generalized Langevin equation is solved using mathematical methods. Meanwhile, the variation of the output amplitude with system parameters is discussed. It is found that there is no SR in the first-order moment expression, while both SR and inverse stochastic resonance phenomena exist in the second-order moment expression, which have not been reported in previous studies.
NONLINEAR DYNAMICS
(2022)
Article
Mathematics, Applied
Ciprian A. Tudor
Summary: This paper investigates the generalized Langevin equation driven by a fractional non-Gaussian noise, known as the Hermite process. The existence and uniqueness of the solution for this equation and various properties are proved. The work also establishes an important connection between the solution to the Langevin equation with Hermite noise and a class of self-similar stochastic processes with stationary increments. Based on this relationship, the regularity of the sample paths of the solution and the behavior of its p-variation are deduced. Applications related to the statistical estimation of the noise intensity parameter or the Euler method for the generalized Langevin equation are also discussed.
FRACTIONAL CALCULUS AND APPLIED ANALYSIS
(2023)
Article
Physics, Fluids & Plasmas
Ben Schubert, Noah S. Molinski, Ingo von Borstel, Thilo Glissmann, Daniyar Balapanov, Andrei Vedernikov, Juergen Blum
Summary: By analyzing the translational and rotational Brownian motion of micrometer-sized silica spheres aggregates, this study determined the mass, translational response time, moment of inertia, and rotational response time for each individual dust aggregate. A positive correlation between mass and response time was found, consistent with aggregate structures with low fractal dimensions. The fractal dimension of the aggregate ensemble was determined using the mass and moment of inertia. Slight deviations from pure Gaussian one-dimensional displacement statistics were observed in the ballistic limit for both translational and rotational Brownian motion.
Article
Physics, Multidisciplinary
Bo Zhang, Alexey Snezhko, Andrey Sokolov
Summary: Self-organization phenomena in ensembles of self-propelled particles provide pathways for synthesizing new dynamic states. By controlling and manipulating principles, dielectric rolling colloids energized by a pulsating electric field can self-organize into alternating square lattices. The resistive and hysteresis behaviors of the dynamic lattices to compression and expansion stresses are uncovered. This mechanism can be applied to other active colloidal systems.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Fluids & Plasmas
Dino Osmanovic
Summary: The research investigates the behavior of particles under both conservative and nonconservative forces, deriving approximate forms of the probability distribution of microscopic degrees of freedom through perturbation analysis. A comparison is made between the perturbative expansion and an exactly solvable system. The study also explores how coarse graining the microscopic distributions for different systems leads to various macroscopic states such as attractive interactions and density modifications.
Article
Chemistry, Physical
Stefano Villa, Domenico Larobina, Antonio Stocco, Christophe Blanc, Massimiliano M. M. Villone, Gaetano D'Avino, Maurizio Nobili
Summary: In this article, the mobilities of prolate ellipsoidal micrometric particles close to an air-water interface were measured using dual wave reflection interference microscopy. The particle's position and orientation with respect to the interface were simultaneously measured as a function of time. The experiment and simulation results showed agreement with slip and no-slip boundary conditions predictions for different types of particle translations and rotations at the air-water interface. The evidences were rationalized within the framework of surface incompressibility at the interface.
Article
Astronomy & Astrophysics
P. A. Gonzalez, Marco Olivares, Eleftherios Papantonopoulos, Yerko Vasquez
Summary: The study reveals that the Lorentz-violating version of the BTZ black hole has a richer geodesic structure, allowing for both planetary and circular orbits which are not possible in the standard BTZ background.
Article
Materials Science, Multidisciplinary
Xichao Zhang, Jing Xia, Xiaoxi Liu
Summary: This study investigates the interaction between particle-like skyrmions and a funnel obstacle in nanostructures. It computationally demonstrates that the repulsive interaction between the skyrmions and the funnel obstacle can modify the dynamics of the skyrmions, leading to various nontrivial effects. It also shows that the funnel obstacle can separate the flow of skyrmions into two asymmetric flows and capture the skyrmions in both static and dynamic ways.
Article
Chemistry, Physical
Bernd Jung, Gerhard Jung
Summary: By studying a simplified model system with a tracer particle in a complex environment, we derive generalized Langevin equations (GLEs) using a projection operator formalism and computer simulations. We compare different linear and non-linear coarse-graining procedures to understand the influence of non-linearities on the reconstructed GLEs and the coarse-grained dynamics. We show that non-linear projection operators can overcome the limitations of linear projection operators when dealing with non-linear external potentials.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Alexander P. Antonov, Artem Ryabov, Philipp Maass
Summary: This study shows that solitons can be generated through driven overdamped Brownian dynamics of hard spheres in periodic potentials at high densities. These solitons appear as periodic sequences of different particle assemblies in the limit of zero noise and give rise to particle currents even at low temperatures.
PHYSICAL REVIEW LETTERS
(2022)
Article
Mathematics, Applied
Xinjie Dai, Aiguo Xiao
Summary: This paper generalizes the existing convergence result of Euler method for the overdamped generalized Langevin equation with fractional noise, and introduces several new techniques.
APPLIED MATHEMATICS LETTERS
(2021)
Article
Astronomy & Astrophysics
Mohaddese Heydari-Fard, Malihe Heydari-Fard, Hamid Reza Sepangi
Summary: This study investigates the structure and characteristics of dilaton black holes by exploring timelike and null-like geodesics, and examines the effects of the charge parameter and dilaton coupling constant on these properties.
Article
Geography, Physical
Izael A. Lima, Eric J. R. Parteli, Yaping Shao, Jose S. Andrade, Hans J. Herrmann, Ascanio D. Araujo
Article
Multidisciplinary Sciences
U. Eberhard, H. J. Seybold, E. Secchi, J. Jimenez-Martinez, P. A. Ruehs, A. Ofner, J. S. Andrade, M. Holzner
SCIENTIFIC REPORTS
(2020)
Article
Physics, Multidisciplinary
H. J. Seybold, U. Eberhard, E. Secchi, R. L. C. Cisne, J. Jimenez-Martinez, R. F. S. Andrade, A. D. Araujo, M. Holzner, J. S. Andrade
Summary: Through high-resolution microfluidic experiments and extensive numerical simulations, we demonstrate how the flow patterns inside a swiss-cheese type of pore geometry can be systematically controlled by the intrinsic rheological properties of the fluid. The observed flow localization can be explained by the strong interplay between the disordered geometry of the pore space and the nonlinear rheology of the fluid, highlighting the potential enhancement of chemical reactors and chromatographic devices by controlling the channeling patterns inside disordered porous media.
FRONTIERS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
Danilo S. Borges, Hans J. Herrmann, Humberto A. Carmona, Jose S. Andrade Jr, Ascanio D. Araujo
Summary: Magnetic beads form chains and create self-similar patterns in an inclined Hele-Shaw cell. The patterns differ based on the angle of inclination, with one resembling stacked ropes and the other looking like a fortress from above. The morphological transition between the two patterns is characterized by a competition between friction-induced buckling and gravity, with both patterns exhibiting power law size distributions.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
F. W. S. Lima, Muneer A. Sumour, Andre A. Moreira, Ascanio D. Araujo
Summary: The study reveals the phase transition in the discrete opinion dynamics model on an Apollonian network, which differs from equilibrium models like Ising and Potts. The effect of redirecting a fraction of network links on the Apollonian network was also investigated. The results show a similar effective dimensionality of around 1.0 as observed in free-scale networks.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Article
Multidisciplinary Sciences
Debora Torres, Wagner R. Sena, Humberto A. Carmona, Andre A. Moreira, Hernan A. Makse, Jose S. Andrade
Summary: Eye-tracking experiments reveal a strong correlation between the average magnetization of fixation configurations and text complexity. The study also suggests that coherent texts are closer to their corresponding critical points than non-coherent texts, indicating that different texts may induce distinct cohesive reading activities.
Article
Multidisciplinary Sciences
Caio Ponte, Humberto A. Carmona, Erneson A. Oliveira, Carlos Caminha, Antonio S. Lima Neto, Jose S. Andrade, Vasco Furtado
Summary: Using a data-driven contact tracing model, researchers investigated the transmission of COVID-19 inside buses during different stages of the pandemic in a large Brazilian city. The study found that the effective reproduction numbers inside the buses and in the city followed similar patterns during the first wave of the outbreak, highlighting the importance of special public transportation policies for highly exposed groups like healthcare workers.
SCIENTIFIC REPORTS
(2021)
Article
Mathematics, Applied
Higor S. Monteiro, Ian Leifer, Saulo D. S. Reis, Jose S. Andrade, Hernan A. Makse
Summary: Recent studies have shown the relationship between the structure of network circuits with fibration symmetries and the functionality of biological networks. A fast and memory efficient algorithm has been proposed to identify fibration symmetries in networks, which is an improvement over current approaches used in the literature.
Article
Physics, Multidisciplinary
Michael T. Ramirez, Jose S. Andrade, Andre A. Moreira
Summary: This article explains the method of obtaining exponential cutoffs by adding radial deformation in space, and shows the derivation of two well-known screening potentials in the central force problem.
Article
Biochemical Research Methods
Matteo Serafino, Higor S. Monteiro, Shaojun Luo, Saulo D. S. Reis, Carles Igual, Antonio S. Lima Neto, Matias Travizano, Jose S. Andrade Jr, Hernan A. Makse
Summary: This article investigates the transmission chain of COVID-19 and proposes an optimized quarantine protocol through contact tracing and network analysis. The study finds that although lockdown measures reduce human mobility and disrupt the transmission network, they do not completely halt the spread of the disease. The authors suggest an optimized strategy to break the transmission chain by quarantining a minimal number of "weak links" connecting the large transmission cores.
PLOS COMPUTATIONAL BIOLOGY
(2022)
Article
Physics, Multidisciplinary
J. M. A. Sales, H. J. Seybold, C. L. N. Oliveira, J. S. Andrade
Summary: Two-phase flow through porous media can lead to the formation of drops and fingers, affecting macroscopic properties. In our simulation, we found that the system is ergodic for large volume fractions of the less viscous phase and high capillary numbers. Drop sizes follow a power-law scaling, with the exponent depending on the capillary number. The flow behavior changes at a characteristic capillary number, with large drops below and small droplets and finger-like structures dominating above. The temporal mean velocity of the mixture can be described by a generalized Darcy's law, and the exponent is sensitive to surface tension. In the limit of infinite capillary numbers, the mobility term increases exponentially with the saturation of the less viscous phase.
FRONTIERS IN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Saulo D. S. D. Reis, Lucas Boettcher, Joao P. da C. Nogueira, Geziel S. Sousa, Antonio S. Lima S. Neto, Hans J. J. Herrmann, Jose S. Andrade
Summary: Based on a dataset of dengue cases in Fortaleza from 2011 to 2016, this study examines the spatio-temporal characteristics of dengue outbreaks and identifies differences between epidemic and non-epidemic years. The research suggests that factors like citizen mobility play a significant role in the spatial spread of the disease and that there are higher spatial correlations in epidemic years.
FRONTIERS IN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Hygor P. M. Melo, Diogo P. Mota, Jose S. Andrade, Nuno A. M. Araujo
Summary: The research found that even without traffic congestion, there is asymmetry between the shortest route from home to work and the shortest route from work to home, mainly due to the presence of a significant proportion of one-way streets. It was also discovered that the amplitude of fluctuations decays in accordance with the power law of the shortest path length, and the proportion of one-way streets in the shortest path also decreases accordingly.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Physics, Fluids & Plasmas
S. Tizdast, Z. Ebadi, J. Cheraghalizadeh, M. N. Najafi, Jose S. Andrade, Hans J. Herrmann
Summary: The study explores the generalized two-dimensional Loewner exploration process with self-similar random forces and positively correlated increments, focusing on the characteristics of self-similar traces lacking conformal invariance. The model is investigated based on the input diffusivity parameter kappa, with results showing scale invariance of the generated traces.
Article
Physics, Multidisciplinary
H. A. Carmona, A. W. T. de Noronha, A. A. Moreira, N. A. M. Araujo, J. S. Andrade
PHYSICAL REVIEW RESEARCH
(2020)
