Active Brownian motion with memory delay induced by a viscoelastic medium

Sprenger, Alexander R.; Bair, Christian; Löwen, Hartmut

doi:10.1103/physreve.105.044610

Cited by 18 publications

(7 citation statements)

References 106 publications

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“…Third, it seems promising to apply the present control scheme to active (rather than passive) Brownian particles. Indeed, the study of active particles with retardation effects due to feedback, inertia or other mechanisms is currently an emerging field [1,[21][22][23]40]. From a more general perspective, our work contributes to establishing a link between collective systems under time-delayed feedback and active matter [16].…”

Section: State Diagrammentioning

confidence: 90%

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Spontaneous velocity alignment of Brownian particles with feedback-induced propulsion ^(a)

Kopp

Klapp

2023

EPL

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Based on Brownian dynamics simulations we study the collective behavior of a two-dimensional system of repulsively interacting colloidal particles, where each particle is propelled by a repulsive feedback force with time delay $\tau$. Although the pair interactions are purely isotropic we observea spontaneous, large-scale alignment of the velocity vectors. This phenomenon persists for long times and occurs in the absence of steady-state clustering. We explain our observations by a combination of the effect of steric interactions yielding local velocity ordering, and the effect of time delay, that generates cluster dissolution, velocity persistence and velocity alignment over large distances.Overall, the behavior reveals intriguing similarities, but also differences, to that observed in models of active matter, such as active Brownian particles and the Vicsek model.

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Section: State Diagrammentioning

confidence: 90%

“…clustering and swarming [1,[21][22][23], enriching the already complex collective behavior of active matter. However, so far, there is no comprehensive understanding of the role of time delay and its interplay with activity on structure formation and emergent dynamics of interacting, Brownian systems.…”

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confidence: 99%

Spontaneous velocity alignment of Brownian particles with feedback-induced propulsion ^(a)

Kopp

Klapp

2023

EPL

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“…This has been experimentally shown that the ballistic motion of an active particle is impeded due to the presence of a geometric confinement [58], Janus particles are shown to be confined by polymeric entanglements but can escape at a time scale much shorter than the relaxation time of the polymer solution [59]. In [60], the theoretical framework of an ABP in a viscoelastic media is discussed, but is entirely different with equation (8) since there is no imposed memory kernel onto the the friction coefficient. Lastly, from equation (8), the prevailing motion of ABP for the limit α → 0 show a ballistic behavior at all time [55].…”

Section: Overdamped Langevin Equation and Energeticsmentioning

confidence: 99%

Thermodynamic description of active brownian particle driven by fractional gaussian noise

Rangaig

2024

Phys. Scr.

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As a natural extension of the recent results on the thermodynamics of an active Brownian particle (self-propelled), we study the thermodynamics of an active Brownian particle (ABP) driven by fractional Gaussian noise (FGN). To serve as a prelude of the main results, we start from the conventional Markov process but with time dependent diffusion coefficient, where deviation in integral fluctuation relation (IFR) for total entropy production requires a general definition of the temperature, following the same case for a Brownian particle. In other words, the general temperature definition for this case is independent to the statistics of the rotational motion. We then proceed with the main problem of the paper, which is an active Brownian particle driven by fractional Gaussian noise. Under the assumption that self-propulsion is even under time-reversal, temperature is defined as well as the distance on how far the IFR for total entropy production deviates from the standard definition by adopting the standard definition of trajectory-level entropy and the joint probability of ABP. Furthermore, second law-like concept based on the found deviation is derived, as well as a generalized Clausius inequality. Lastly, magnitude of this deviation diminishes in the case of pure white noise.

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“…Being ubiquitous in nature, the interest in chiral active matter is recently showing exponential growth in time, in different contexts ranging from the statistical properties of single-particles to collective phenomena displayed by interacting systems. Through the introduction of simple models, the single-particle chiral active motion has been explicitly explored 9,15 with a focus on the mean-square displacement, 16,17 in a viscoelastic medium, 18 in the presence of pillars 19 or sinusoidal channels. 20 In channel geometries, chirality is also responsible for the reduction of the accumulation near boundaries typical of active systems and for the formation of surface currents.…”

Section: Introductionmentioning

confidence: 99%

Chiral active matter in external potentials

Caprini¹,

Löwen²,

Marconi³

2023

Soft Matter

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Active Brownian motion with memory delay induced by a viscoelastic medium

Cited by 18 publications

References 106 publications

Spontaneous velocity alignment of Brownian particles with feedback-induced propulsion ^(a)

Spontaneous velocity alignment of Brownian particles with feedback-induced propulsion ^(a)

Thermodynamic description of active brownian particle driven by fractional gaussian noise

Chiral active matter in external potentials

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Active Brownian motion with memory delay induced by a viscoelastic medium

Cited by 18 publications

References 106 publications

Spontaneous velocity alignment of Brownian particles with feedback-induced propulsion (a)

Spontaneous velocity alignment of Brownian particles with feedback-induced propulsion (a)

Thermodynamic description of active brownian particle driven by fractional gaussian noise

Chiral active matter in external potentials

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Product

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Spontaneous velocity alignment of Brownian particles with feedback-induced propulsion ^(a)

Spontaneous velocity alignment of Brownian particles with feedback-induced propulsion ^(a)