Chirality inversion and odd transport in a suspension of living rotors

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1. Proche Contexte plus large Pas pertinent

   Topology protects chiral edge currents in stochastic systems

   Evelyn Tang, Jaime Agudo-Canalejo, Ramin Golestanian · 2020 · Phys. Rev. X 11, 031015 (2021) · cité 52 fois · Résumé IA disponible

   Topology protects des courants de bord chiraux dans des réseaux stochastiques, tandis que l’article étudie la chiralité collective d’une suspension de cellules rotatives.

   Résumé scientifique

   Constructing systems that exhibit time-scales much longer than those of the underlying components, as well as emergent dynamical and collective behavior, is a key goal in fields such as synthetic biology and materials self-assembly. Inspiration often comes from living systems, in which robust global behavior prevails despite the stochasticity of the underlying processes. Here, we present two-dimensional stochastic networks that consist of minimal motifs representing out-of-equilibrium cycles at the molecular scale and support chiral edge currents in configuration space. These currents arise in the topological phase due to the bulk-boundary correspondence and dominate the system dynamics in t…

2. Proche Contexte plus large Pas pertinent

   Scaling behavior in non-reciprocal and odd conserved dynamics near criticality

   Martin Kjøllesdal Johnsrud, Giulia Pisegna, Ramin Golestanian · 2026 · Soft Condensed Matter · Résumé IA disponible

   Scaling behavior analyse la dynamique conservée non réciproque près d’un point critique, un cadre de matière active distinct des rotors cellulaires.

   Résumé scientifique

   In recent years, non-reciprocity has been explored as a ubiquitous manifestation of non-equilibrium activity at the microscopic scales for various active matter systems, from mixtures of chemically active enzymes, colloids, and droplets, to engineered light-controlled active colloids and robotic meta-materials. A commonly used minimal model to describe the dynamics of a binary mixture of conserved species with non-reciprocal interactions is the non-reciprocal Cahn-Hilliard (NRCH) model. The model is characterized by a temperature-like tuning parameter, which can trigger phase separation, and a non-reciprocal coupling, which can lead to the formation of spatio-temporal patterns, as it represe…

3. Apparenté Contexte plus large Pas pertinent

   Continuous Symmetry Breaking in a Two-dimensional Rydberg Array

   Cheng Chen, Guillaume Bornet, Marcus Bintz et al. · 2022 · Quantum Gases · cité 222 fois · Résumé IA disponible

   Continuous Symmetry Breaking étudie la brisure de symétrie dans un réseau de Rydberg, plutôt que la transmission de chiralité par des cellules.

   Résumé scientifique

   Spontaneous symmetry breaking underlies much of our classification of phases of matter and their associated transitions. It provides an example of the power of many-body interactions, enabling a collection of individual degrees of freedom to align its behavior across large spatial and temporal scales. Crucially, the nature of the underlying symmetry being broken determines many of the qualitative properties of the phase; this is illustrated by the case of discrete versus continuous symmetry breaking. Indeed, in contrast to the discrete case, the breaking of a continuous symmetry is governed by Goldstone's theorem, which predicts the existence of gapless modes that mediate power-law correlati…

4. Apparenté Contexte plus large Pas pertinent

   The chiral magnetic effect in hydrodynamical approach

   A. V. Sadofyev, M. V. Isachenkov · 2010 · Phys.Lett.B697:404-406,2011 · cité 144 fois · Résumé IA disponible

   The chiral magnetic effect décrit des courants induits par la chiralité dans un plasma quark-gluon, sans suspension de rotors vivants.

   Résumé scientifique

   In quark-gluon plasma nonzero chirality can be induced by the chiral anomaly. When a magnetic field is applied to a system with nonzero chirality an electromagnetic current is induced along the magnetic field. This phenomenon is called the chiral magnetic effect. In this paper appearance of the chiral magnetic effect in hydrodynamical approximation is shown. We consider a hydrodynamical model for chiral liquid with two independent currents of left and right handed particles in the presence of the chiral anomaly.

5. Apparenté Même question Pas pertinent

   Directed Aggregation of Cellulose Nanocrystals to Enhance Chiral Twist

   Kévin Ballu, Jia-Hui Lim, Thomas G. Parton et al. · 2024 · Soft Condensed Matter · cité 23 fois · Résumé IA disponible

   Directed Aggregation étudie comment l’agrégation de nanocristaux de cellulose renforce la torsion chirale d’une suspension.

   Résumé scientifique

   Cellulose nanocrystals (CNCs) are bioderived nanoparticles that can be isolated from any source of natural cellulose via sulfuric acid hydrolysis. Arising from a combination of the negatively-charged sulfate half-ester groups grafted during this process and their elongated morphology, CNCs typically form colloidal cholesteric liquid crystalline phases in aqueous suspension. Recently, the chiral strength of such a CNC mesophase was correlated to the presence of CNCs with a 'bundle' morphology, analogous to the case of chiral dopants in molecular liquid crystal systems. This indicates the central role these composite particles play in the chiral behavior of CNCs, however the origin and formati…

6. Apparenté Contexte plus large Pas pertinent

   Spiral Defect Chaos in Large Aspect Ratio Rayleigh-Benard Convection

   Stephen W. Morris, Eberhard Bodenschatz, David S. Cannell et al. · 1993 · patt-sol · cité 207 fois · Résumé IA disponible

   Spiral Defect Chaos observe des spirales tournantes et des défauts dans la convection de Rayleigh-Bénard, un autre système fluide collectif.

   Résumé scientifique

   We report experiments on convection patterns in a cylindrical cell with a large aspect ratio. The fluid had a Prandtl number of approximately 1. We observed a chaotic pattern consisting of many rotating spirals and other defects in the parameter range where theory predicts that steady straight rolls should be stable. The correlation length of the pattern decreased rapidly with increasing control parameter so that the size of a correlated area became much smaller than the area of the cell. This suggests that the chaotic behavior is intrinsic to large aspect ratio geometries.

7. Apparenté Contexte plus large Pas pertinent

   Pumping with Symmetry

   Julio Andrés Iglesias Martínez, Muamer Kadic, Vincent Laude et al. · 2023 · Materials Science · cité 2 fois · Résumé IA disponible

   Pumping with Symmetry examine des changements de symétrie et leurs charges topologiques dans un cristal acoustique, sans transport par cellules.

   Résumé scientifique

   Re-configurable materials and meta-materials can jump between space symmetry classes during their deformations. Here, we introduce the concept of singular symmetry enhancement, which refers to an abrupt jump to a higher symmetry class accompanied by an un-avoidable reduction in the number of dispersion bands of the excitations of the material. Such phenomenon prompts closings of some of the spectral resonant gaps along singular manifolds in a parameter space. In this work, we demonstrate that these singular manifolds carry topological charges. As a concrete example, we show that a deformation of an acoustic crystal that encircles a $p11g$-symmetric configuration of the cavity resonators resu…

8. Apparenté Contexte plus large Pas pertinent

   Self-similar dynamics of bacterial chemotaxis

   Waipot Ngamsaad, Kannika Khompurngson · 2012 · Phys. Rev. E 86, 062901 (2012) · cité 7 fois · Résumé IA disponible

   Self-similar dynamics modélise les motifs de colonies bactériennes produits par chimiotaxie, plutôt que les amas hydrodynamiques de cellules rotatives.

   Résumé scientifique

   Colonies of bacteria grown on thin agar plate exhibit fractal patterns as a result of adaptation to their environments. The bacterial colony pattern formation is regulated crucially by chemotaxis, the movement of cells along a chemical concentration gradient. Here, the dynamics of pattern formation in bacterial colony is investigated theoretically through a continuum model that considers chemotaxis. In the case of the gradient sensed by the bacterium is nearly uniform, the bacterial colony patterns are self-similar, which they look the same at every scale. The scaling law of the bacterial colony growth has been revealed explicitly. Chemotaxis biases the movement of bacterial population in co…