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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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  Damping-Driven Time Reversal for Waves

  Damping is usually associated with irreversibility. Here, we present a counterintuitive concept to achieve time reversal of waves propagating in a lossless medium using a transitory dissipation pulse. Applying a sudden and strong damping in a (...)

  
  
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  Reconfiguration, Interrupted Aging and Enhanced Dynamics of a Colloidal Gel using Photo-Switchable Active Doping

  We study light-activated quasi-2d gels made of a colloidal network doped with Janus particles. Following the gel formation, the internal dynamics of the gel are monitored before, during, and after the light activation. We monitor both the (...)

  
  

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