Non-conservative forces and effective temperatures in active polymers

Abstract

We follow the dynamics of an ensemble of interacting self-propelled semi-flexible polymers in contact with a thermal bath. We characterize structure and dynamics of the passive system and as a function of the motor activity. We find that the fluctuation-dissipation relation allows for the definition of an effective temperature that is compatible with the results obtained by using a tracer particle as a thermometer. The effective temperature takes a higher value than the temperature of the bath when the effect of the motors is not correlated with the structural rearrangements they induce. Our data are compatible with a dependence upon the square of the motor strength (normalized by the average internal force) and they suggest an intriguing linear dependence on the tracer diffusion constant times the density of the embedding matrix. We show how to use this concept to rationalize experimental results and suggest possible innovative research directions.

References in corpus (22)

• Novel type of phase transition in a system of self-driven particles
• Self-motile colloidal particles: from directed propulsion to random walk
• The Mechanics and Statistics of Active Matter
• Fluctuation-Dissipation: Response Theory in Statistical Physics
• Collective motion of self-propelled particles interacting without cohesion
• Collective Motion of Vibrated Polar Disks
• Sedimentation of active colloidal suspensions
• Steady-state hydrodynamic instabilities of active liquid crystals: Hybrid lattice Boltzmann simulations
• Sedimentation, trapping, and rectification of dilute bacteria
• Spontaneously ordered motion of self-propelled particles
• Lattice Models of Nonequilibrium Bacterial Dynamics
• Generic phase diagram of active polar films
• Dynamic regimes of hydrodynamically coupled self-propelling particles
• Fluctuation-dissipation ratios in the dynamics of self-assembly
• Revisiting the slow dynamics of a silica melt using Monte Carlo simulations
• Effective temperatures and activated dynamics for a two-dimensional air-driven granular system on two approaches to jamming
• Growing correlations and aging of an elastic line in a random potential
• Particle dynamics and effective temperature of jammed granular matter in a slowly sheared 3D Couette cell
• Structural and conformational dynamics of supercooled polymer melts: Insights from first-principles theory and simulations
• Nanoscale dynamics and the fluctuation-dissipation-relation in an aging polymer glass
• The Interplay of Nonlinearity and Architecture in Equilibrium Cytoskeletal Mechanics
• The Ratchet effect in an ageing glass

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• Motility-induced phase separation and coarsening in active matter
• Small activity differences drive phase separation in active-passive polymer mixtures
• How does a flexible chain of active particles swell?
• Collective Dynamics of Self-propelled Semiflexible Filaments
• Structure and dynamics of a self-propelled semiflexible filament
• From single-particle to collective effective temperatures in an active fluid of self-propelled particles
• Conformation and dynamics of a self-avoiding active flexible polymer
• Active Brownian filaments with hydrodynamic interactions: conformations and dynamics
• Effective temperatures in inhomogeneous passive and active bidimensional Brownian particle systems
• Dynamics of a homogeneous active dumbbell system
• Dynamics and escape of active particles in a harmonic trap
• Active dumbbells: dynamics and morphology in the coexisting region
• Translational and rotational dynamics of a self-propelled Janus probe in crowded environments
• Anomalous diffusion for active Brownian particles cross-linked to a networked polymer: Langevin dynamics simulation and theory
• The Coil-Globule transition in self-avoiding active polymers
• Anisotropic dynamics of a self-assembled colloidal chain in an active bath
• Hyperbolic heat conduction, effective temperature and third law in the presence of heat flux
• Tuning Nonequilibrium Phase Transitions with Inertia
• Hydrodynamics of polymers in an active bath
• Low thermal fluctuations in a system heated out of equilibrium
• Signatures of motor susceptibility in the dynamics of a tracer particle in an active gel
• Linear response to leadership, effective temperature and decision making in flocks
• A general fluctuation-response relation for noise variations and its application to driven hydrodynamic experiments
• Effective forces between active polymers
• Fluctuations of rotational and translational degrees of freedom in an interacting active dumbbell system
• Nonequilibrium diffusion of active particles bound to a semi-flexible polymer network: simulations and fractional Langevin equation
• Activity-dependent self-regulation of viscous length scales in biological systems
• Active Polymer Behavior in Two Dimensions: A Comparative Analysis of Tangential and Push-Pull Models
• Extended Nyquist formula for a resistance subject to a heat flow
• Activity-Induced Stiffness, Entanglement Network and Dynamic Slowdown in Unentangled Semidilute Polymer Solutions
• Effective and efficient modeling of the hydrodynamics for bacterial flagella
• Statistics of Thermal Avalanches in Driven Amorphous Systems