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Physics, Fluids & Plasmas
Juan Ruben Gomez-Solano, Rosalio F. Rodriguez, Elizabeth Salinas-Rodriguez
Summary: In this work, we studied the dynamics of number-density fluctuations in a dilute suspension of active particles in a linear viscoelastic fluid. We proposed a model for the diffusion coefficient of the active particles that takes into account the rotational diffusion and the viscoelasticity of the medium. Using fluctuating hydrodynamics, we derived the linearized equations for the active suspension and calculated its dynamic structure factor and intermediate scattering function. Our findings show that these functions exhibit complex dependencies on the parameters characterizing the viscoelasticity of the solvent and the activity of the particles, which differ significantly from those of inert suspensions and active suspensions in a Newtonian solvent. In certain regions of the parameter space, oscillations in the intermediate scattering function are observed, indicating the nonequilibrium particle activity and encoding the viscoelastic properties of the medium.
Article
Multidisciplinary Sciences
Pauline Formaglio, Marina E. Wosniack, Raphael M. Tromer, Jaderson G. Polli, Yuri B. Matos, Hang Zhong, Ernesto P. Raposo, Marcos G. E. da Luz, Rogerio Amino
Summary: Plasmodium sporozoites actively migrate in the dermis and enter blood vessels to induce infection. Through intravital imaging, researchers found that sporozoites adopt a strategy of alternating global superdiffusive skin exploration and local subdiffusive blood vessel exploitation, enabling them to find intravasation hotspots associated with pericytes, enter the bloodstream and initiate malaria infection.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Antonio Ciarlo, Raffaele Pastore, Francesco Greco, Antonio Sasso, Giuseppe Pesce
Summary: This study investigates a quasi-2D suspension of Brownian particles in an optical speckle field generated by holographic manipulation. The experiment aims to understand a distinctive type of diffusion, called Fickian yet Non Gaussian diffusion (FnGD), which has been observed in colloidal particles in complex and biological fluids. Simulation results also provide insights into the experimental findings and can guide future experiments.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Medicinal
Ran Liu, Xiang Liu, Jie Wu
Summary: In this study, we propose molecular descriptors based on persistent path-spectral and a machine learning model based on persistent path-spectral for the prediction of protein-ligand binding affinity. Our model combines the molecular descriptors from persistent path-spectral attributes with the gradient boosting tree machine learning model. We test this model on three commonly used datasets and achieve competitive results.
JOURNAL OF CHEMICAL INFORMATION AND MODELING
(2023)
Article
Astronomy & Astrophysics
Anh Dung Le, Alfred H. Mueller, Stephane Munier
Summary: This study examines the scattering of a small onium off a large nucleus at high center-of-mass energies, using the color dipole picture in quantum chromodynamics. By analyzing different reference frames, it is shown that complete asymptotic expressions can be derived beyond the total cross section, based on limited knowledge of the Balitsky-Kovchegov equation solutions. An analytic expression for the rapidity distribution of the first branching of the slowest parent dipole is obtained, which provides an estimator of the correlations of interacting dipoles and is relevant to diffractive dissociation phenomena. The results presented may have broader implications for one-dimensional branching random walk models.
Article
Physics, Multidisciplinary
Adrian Pacheco-Pozo, Igor M. Sokolov
Summary: In usual diffusion, concentration profiles smoothly converge to a Gaussian distribution, but in disordered media with infinite contrast, initial sharp features may not smooth out over long times, which is important for diagnosing disorders in complex systems such as biological systems.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Fluids & Plasmas
Fernanda H. Gonzalez, Alejandro P. Riascos, Denis Boyer
Summary: The study focuses on diffusive transport of Markovian random walks on networks with stochastic resetting to multiple nodes. Analytical expressions for stationary occupation probability, mean, and global first passage times are derived to characterize the effect of resetting on random walk strategies. The methods are applied to various dynamics, including Levy flights and Google random walk strategy.
Article
Physics, Fluids & Plasmas
Fei Ma, Ping Wang
Summary: The study proposes a simple algorithmic framework for generating power-law graphs with small diameters and examines their structural properties. The results show that these graphs have unique features such as density characteristics and higher trapping efficiency compared to existing scale-free models, confirmed through extensive simulations.
Article
Physics, Fluids & Plasmas
Costantino Di Bello, Alexander K. Hartmann, Satya N. Majumdar, Francesco Mori, Alberto Rosso, Gregory Schehr
Summary: This article investigates the effects of resetting on the distribution of the integrated particle current in a system of noninteracting particles on a line. Two different models, namely independent Brownian motion with resetting and run-and-tumble motion with resetting, are considered. The study shows that resetting induces a stationary limiting distribution of the current at long times, but the approach to the stationary state is drastically different for annealed and quenched cases. A third-order phase transition is observed in the rate function of the quenched distribution. Numerical and analytical methods are used to compute the associated rate functions for both models.
Article
Physics, Multidisciplinary
Naftali R. Smith, Satya N. Majumdar, Gregory Schehr
Summary: This study investigates a random process x(tau) that undergoes stochastic resetting at a constant rate r with a position chosen from a distribution P(x). The study considers a sequence of dynamical observables A1, ..., An related to the intervals between resetting events. The study calculates the exact probabilities of various events associated with this sequence, such as the last element being larger than all previous ones, or the sequence being monotonically increasing. Remarkably, the study finds that these probabilities are super-universal, meaning they are independent of the specific process x(tau), the observables Ak's, and the resetting distribution P(x). The universality holds for some events as long as certain mild assumptions on the process and observables are met, such as mirror symmetry.
Article
Physics, Fluids & Plasmas
J. Cleland, M. A. K. Williams
Summary: This article explores the mathematical description of anomalous diffusion driven by internal stresses instead of thermal fluctuations. It outlines a continuous time random walk framework to describe the waiting times between displacements, and identifies the associated generalized diffusion equation. The probability density function and second moment display different characteristics at different timescales, transitioning between subdiffusive and diffusive behavior.
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Physics, Fluids & Plasmas
Federica Baccini, Filippo Geraci, Ginestra Bianconi
Summary: This study addresses the limitations of unweighted simplical complexes in representing higher-order interactions by introducing weighted simplical complexes, which can capture the weighted topology of the data without information loss.
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Physics, Multidisciplinary
J. Klinger, R. Voituriez, O. Benichou
Summary: We derive a universal and exact asymptotic form of the splitting probability for symmetric continuous jump processes, which highlights the importance of microscopic dynamics and provides explicit predictions for characterizing the effective random process in light scattering.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Mathematical
Wai-Tong Louis Fan, Wenqing Hu, Grigory Terlov
Summary: This study analyzes the asymptotic wave speed for FKPP type reaction-diffusion equations on a class of infinite random metric trees, demonstrating the emergence of a traveling wavefront when the reaction rate is sufficiently large. The wavefront speed is quantified using a variational formula involving random branching degrees and random branch lengths. This speed is slower than that of the same equation on the real line, with estimates in terms of the tree's metric structure. The analysis connects wavefront propagation to the large deviations principle of multi-skewed Brownian motion with random parameters, involving delicate estimates for random matrices and hitting times of a random walk in a random environment.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2021)
Article
Multidisciplinary Sciences
Giulia Cencetti, Federico Battiston, Bruno Lepri, Marton Karsai
Summary: The research findings show that higher-order interactions are common in temporal social networks, characterized by bursty dynamics with rapidly recurring events separated by long periods of inactivity. The formation and dissolution of groups differ between spontaneous social settings and work settings, with the latter being more abrupt. Furthermore, there is a temporal reinforcement effect indicating that longer group cohesiveness leads to higher probability of persistent interaction patterns in the future.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Condensed Matter
Manas Khan, Thomas G. Mason
JOURNAL OF PHYSICS-CONDENSED MATTER
(2016)
Article
Physics, Applied
Manas Khan, Harsh Soni, A. K. Sood
APPLIED PHYSICS LETTERS
(2009)
Article
Physics, Multidisciplinary
Manas Khan, A. K. Sood
Article
Physics, Multidisciplinary
Manas Khan, A. K. Sood
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Physics, Fluids & Plasmas
Manas Khan, A. K. Sood
Article
Chemistry, Physical
Manas Khan, Thomas G. Mason
Article
Physics, Multidisciplinary
Manas Khan, Kathryn Regan, Rae M. Robertson-Anderson
PHYSICAL REVIEW LETTERS
(2019)
Article
Chemistry, Multidisciplinary
Manas Khan, A. K. Sood, F. Leonard Deepak, C. N. R. Rao
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2007)
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Nanoscience & Nanotechnology
Manas Khan, A. K. Sood, F. L. Deepak, C. N. R. Rao
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Optics
M Khan, AK Sood, SK Mohanty, PK Gupta, GV Arabale, K Vijaymohanan, CNR Rao
Article
Physics, Multidisciplinary
M Khan, SK Mohanty, AK Sood
PRAMANA-JOURNAL OF PHYSICS
(2005)