Search Results - "Marchetti, M Cristina"
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The statistical physics of active matter: From self-catalytic colloids to living cells
Published in Physica A (15-08-2018)“…These lecture notes are designed to provide a brief introduction into the phenomenology of active matter and to present some of the analytical tools used to…”
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Nonreciprocity as a generic route to traveling states
Published in Proceedings of the National Academy of Sciences - PNAS (18-08-2020)“…We examine a nonreciprocally coupled dynamical model of a mixture of two diffusing species. We demonstrate that nonreciprocity, which is encoded in the model…”
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Viscoelastic control of spatiotemporal order in bacterial active matter
Published in Nature (London) (04-02-2021)“…Active matter consists of units that generate mechanical work by consuming energy 1 . Examples include living systems (such as assemblies of bacteria 2 – 5 and…”
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Hydrodynamics of Active Defects: From Order to Chaos to Defect Ordering
Published in Physical review. X (04-12-2019)“…Topological defects play a prominent role in the physics of two-dimensional materials. When driven out of equilibrium in active nematics, disclinations can…”
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Emergence of dynamic vortex glasses in disordered polar active fluids
Published in Proceedings of the National Academy of Sciences - PNAS (09-03-2021)“…In equilibrium, disorder conspires with topological defects to redefine the ordered states of matter in systems as diverse as crystals, superconductors, and…”
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Symmetry, Thermodynamics, and Topology in Active Matter
Published in Physical review. X (01-02-2022)“…The name active matter refers to any collection of entities that individually use free energy to generate their own motion and forces. Through interactions,…”
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Defect annihilation and proliferation in active nematics
Published in Physical review letters (29-05-2013)“…Liquid crystals inevitably possess topological defect excitations generated through boundary conditions, through applied fields, or in quenches to the ordered…”
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Aggregation and segregation of confined active particles
Published in Soft matter (14-09-2014)“…We simulate a model of self-propelled disks with soft repulsive interactions confined to a box in two dimensions. For small rotational diffusion rates,…”
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A nonequilibrium force can stabilize 2D active nematics
Published in Proceedings of the National Academy of Sciences - PNAS (03-07-2018)“…Suspensions of actively driven anisotropic objects exhibit distinctively nonequilibrium behaviors, and current theories predict that they are incapable of…”
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Enhanced diffusion and ordering of self-propelled rods
Published in Physical review letters (31-12-2008)“…Starting from a minimal physical model of self-propelled hard rods on a substrate in two dimensions, we derive a modified Smoluchowski equation for the system…”
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Defect dynamics in active nematics
Published in Philosophical transactions of the Royal Society of London. Series A: Mathematical, physical, and engineering sciences (28-11-2014)“…Topological defects are distinctive signatures of liquid crystals. They profoundly affect the viscoelastic behaviour of the fluid by constraining the…”
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Statistical mechanics and hydrodynamics of bacterial suspensions
Published in Proceedings of the National Academy of Sciences - PNAS (15-09-2009)“…Unicellular living organisms, such as bacteria and algae, propel themselves through a medium via cyclic strokes involving the motion of cilia and flagella…”
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Cellular Contraction and Polarization Drive Collective Cellular Motion
Published in Biophysical journal (21-06-2016)“…Coordinated motions of close-packed multicellular systems typically generate cooperative packs, swirls, and clusters. These cooperative motions are driven by…”
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Phase Transition to Large Scale Coherent Structures in Two-Dimensional Active Matter Turbulence
Published in Physical review letters (31-05-2019)“…The collective motion of microswimmers in suspensions induce patterns of vortices on scales that are much larger than the characteristic size of a…”
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Topological Sound and Flocking on Curved Surfaces
Published in Physical review. X (07-09-2017)“…Active systems on curved geometries are ubiquitous in the living world. In the presence of curvature, orientationally ordered polar flocks are forced to be…”
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Dynamics of active liquid interfaces
Published in Science (American Association for the Advancement of Science) (12-08-2022)“…Controlling interfaces of phase-separating fluid mixtures is key to the creation of diverse functional soft materials. Traditionally, this is accomplished with…”
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Correlating cell shape and cellular stress in motile confluent tissues
Published in Proceedings of the National Academy of Sciences - PNAS (28-11-2017)“…Collective cell migration is a highly regulated process involved in wound healing, cancer metastasis, and morphogenesis. Mechanical interactions among cells…”
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Anomalous glassy dynamics in simple models of dense biological tissue
Published in Europhysics letters (01-02-2018)“…In order to understand the mechanisms for glassy dynamics in biological tissues and shed light on those in non-biological materials, we study the…”
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Topology and dynamics of active nematic vesicles
Published in Science (American Association for the Advancement of Science) (05-09-2014)“…Engineering synthetic materials that mimic the remarkable complexity of living organisms is a fundamental challenge in science and technology. We studied the…”
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Geometry Regulates Traction Stresses in Adherent Cells
Published in Biophysical journal (19-08-2014)“…Cells generate mechanical stresses via the action of myosin motors on the actin cytoskeleton. Although the molecular origin of force generation is well…”
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