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We analyze a dilute suspension of active particles confined between walls and subjected to fields that can modulate particle speed as well as orientation. Generally, the particle distribution is different in the bulk compared to near the…

软凝聚态物质 · 物理学 2022-08-23 Vaseem A. Shaik , Zhiwei Peng , John F. Brady , Gwynn J. Elfring

Collections of interacting, self-propelled particles have been extensively studied as minimal models of many living and synthetic systems from bird flocks to active colloids. However, the influence of active rotations in the absence of…

软凝聚态物质 · 物理学 2016-11-23 Benjamin C. van Zuiden , Jayson Paulose , William T. M. Irvine , Denis Bartolo , Vincenzo Vitelli

Chiral materials, similarly to human hands, have distinguishable right-handed and left-handed enantiomers which may behave differently in response to external stimuli. Here, we use for the first time an approach based on the density…

We investigate the dynamics of passive particles immersed in a bath of chiral active particles, focusing on the emergence of collective rotational motion. Using numerical simulations, we show that passive particles aggregate into clusters…

软凝聚态物质 · 物理学 2026-04-14 Divya Kushwaha , Abhra Puitandy , Shradha Mishra

We investigate numerically the dynamics of shape and displacement fluctuations of two-dimensional flexible vesicles filled with active particles. At low concentration most of the active particles accumulate at the boundary of the vesicle…

统计力学 · 物理学 2016-09-29 Matteo Paoluzzi , Roberto Di Leonardo , M Cristina Marchetti , Luca Angelani

We show that spontaneous density segregation in dense systems of aligning circle swimmers is a condensation phenomenon at odds with the phase separation scenarios usually observed in two-dimensional active matter. The condensates, which…

软凝聚态物质 · 物理学 2024-12-20 Yujia Wang , Bruno Ventéjou , Hugues Chaté , Xia-qing Shi

We investigate magnetic active matter in confined geometries using both experiments with magnetic toy robots Hexbugs and simulations of elongated magnetic active Brownian particles in circular domains. Standard active particles tend to…

软凝聚态物质 · 物理学 2025-11-27 Marco Musacchio , Markus Felber , Matteo Paoluzzi , Andrea Gnoli , Andrea Puglisi , Luca Angelani

In this work, we study the stationary behavior of an assembly of independent chiral active particles under confinement by employing an extension of the active Ornstein-Uhlenbeck model. The chirality modeled by means of an effective torque…

统计力学 · 物理学 2018-12-14 Lorenzo Caprini , Umberto Marini Bettolo Marconi

We investigate the swim pressure exerted by non-chiral and chiral active particles on convex or concave circular boundaries. Active particles are modeled as non-interacting and non-aligning self-propelled Brownian particles. The convex and…

软凝聚态物质 · 物理学 2020-10-01 Tayeb Jamali , Ali Naji

This article reviews steady-state spin densities and spin currents in materials with strong spin-orbit interactions. These phenomena are intimately related to spin precession due to spin-orbit coupling which has no equivalent in the steady…

介观与纳米尺度物理 · 物理学 2015-05-13 Dimitrie Culcer

We investigate the problem of structures formation in accretion disc zone, resulting from the tidally interaction in close binary star system. We aim to examine the area where the incoming flow meets the matter around secondary star and the…

太阳与恒星天体物理 · 物理学 2012-10-11 Daniela Boneva , Lachezar Filipov

We investigate collective phenomena with rotationally driven spinners of concave shape. Each spinner experiences a constant internal torque in either a clockwise or counterclockwise direction. Although the spinners are modeled as hard,…

软凝聚态物质 · 物理学 2014-03-10 Nguyen H. P. Nguyen , Daphne Klotsa , Michael Engel , Sharon C. Glotzer

We study a model chiral fluid in two dimensions composed of Brownian disks interacting via a Lennard-Jones potential and a non-conservative transverse force, mimicking colloids spinning at a rate $\omega$. The system exhibits a phase…

软凝聚态物质 · 物理学 2023-07-10 Claudio B. Caporusso , Giuseppe Gonnella , Demian Levis

We consider a mesoscopic {\it ballistic} structure with Rashba spin-orbit splitting of the electron spectrum. The ballistic region is attached to the leads with a voltage applied between them. We calculate the edge spin density which…

介观与纳米尺度物理 · 物理学 2015-05-19 Alexander Khaetskii , Eugene Sukhorukov

Chiral active matter is a variant of active matter systems in which the motion of the constituent particles violates mirror symmetry. In this letter, we simulate two-dimensional chiral Active Brownian Particles, the simplest chiral model in…

软凝聚态物质 · 物理学 2025-12-03 Kangeun Jeong , Yuta Kuroda , Yuki Asatani , Takeshi Kawasaki , Kunimasa Miyazaki

The spin dynamics of electrons in chiral molecular systems remain a topic of intense interest, particularly regarding whether geometric chirality inherently induces spin polarization in current-carrying electrons. In this work, we employ ab…

Density-wave fronts in a vibrofluidized wet granular layer undergoing a gas-liquid-like transition are investigated experimentally. The threshold of the instability is governed by the amplitude of the vertical vibrations. Fronts, which are…

软凝聚态物质 · 物理学 2017-05-09 Andreas Zippelius , Kai Huang

We consider a two-dimensional structure with spin-orbit-related splitting of the electron (hole) spectrum and calculate the edge spin density which appears due to the intrinsic mechanism of spin-orbit interaction in the presence of a charge…

介观与纳米尺度物理 · 物理学 2015-06-18 Alexander Khaetskii

We explore the edge flows that emerge at boundaries in nonequilibrium passive and active chiral colloidal fluids. We show that these complex interface currents obey an equation of state that relates their fluxes to bulk observables. For…

软凝聚态物质 · 物理学 2026-04-22 Jessica Metzger , Cory Hargus , Julien Tailleur , Frédéric van Wijland

We report, for the first time, some experimental observations regarding a new type of long range interaction between rigid particles that prevails when they are suspended in an soft elastic gel. A denser particle submerges itself to a…

软凝聚态物质 · 物理学 2014-01-29 Aditi Chakrabarti , Manoj K. Chaudhury