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  Odd elasticity and topological waves in active surfaces

  Odd elasticity describes active elastic systems whose stress-strain relationship is not compatible with a potential energy. As the requirement of energy conservation is lifted from linear elasticity, new antisymmetric (odd) components appear in (...)

  
  
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  Noise-induced collective actuation in active solids

  Collective actuation describes the spontaneous synchronized oscillations taking place in active solids when the elasto-active feedback, which generically couples the reorientation of the active forces and the elastic stress, is large enough. In (...)

  
  
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  Dynamical order and many-body correlations in zebrafish show that three is a crowd

  Zebrafish constitute a convenient laboratory–based biological system for studying collective behavior. It is possible to interpret a group of zebrafish as a system of interacting agents and to apply methods developed for the analysis of systems (...)

  
  
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  In Vitro Enzyme Self-Selection Using Molecular Programs

  Directed evolution provides a powerful route for in vitro enzyme engineering. State-of-the-art techniques functionally screen up to millions of enzyme variants using high throughput microfluidic sorters, whose operation remains technically (...)

  
  
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  Does the Larkin length exist?

  The yield stress of random solid solutions is a classic theme in physical metallurgy that currently attracts a renewed interest in connection to high entropy alloys. Here, we revisit this subject using a minimal dislocation dynamics model, where (...)

  
  
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  Martingale drift of Langevin dynamics and classical canonical spin statistics

  A martingale is a stochastic process that encodes a kind of fairness or unbiasedness, which is associated with a reference process. Here we show that, if the reference process xt evolves according to the Langevin equation with drift a(x) and if (...)

  
  
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  Spontaneous self-constraint in active nematic flows

  Active processes drive biological dynamics across various scales and include subcellular cytoskeletal remodelling, tissue development in embryogenesis and the population-level expansion of bacterial colonies. In each of these, biological (...)

  
  
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  Enhanced diffusion of tracer particles in nonreciprocal mixtures

  We study the diffusivity of a tagged particle in a binary mixture of Brownian particles with nonreciprocal interactions. Numerical simulations reveal that, for a broad class of interaction potentials, nonreciprocity can significantly increase (...)

  
  
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  Non-Gaussian fluctuations of a probe coupled to a Gaussian field

  The motion of a colloidal probe in a complex fluid, such as a micellar solution, is usually described by the generalized Langevin equation, which is linear. However, recent numerical simulations and experiments have shown that this linear model (...)

  
  
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  Cross-sections of doubly curved sheets as confined elastica

  Although thin films are typically manufactured in planar sheets or rolls, they are often forced into three-dimensional (3D) shapes, producing a plethora of structures across multiple length scales. To understand this complex response, previous (...)

  
  

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