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Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes
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Ordering kinetics in the active model B.

Sudipta Pattanayak1, Shradha Mishra2, Sanjay Puri3

  • 1S.N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake City, Kolkata 700106, India.

Physical Review. E
|August 20, 2021
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Summary
This summary is machine-generated.

Introducing activity into Model B drastically alters ordering kinetics. Domain growth shifts from Lifshitz-Slyozov (t^{1/3}) to a novel t^{1/4} law, with scaling functions dependent on activity strength.

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Area of Science:

  • Physics
  • Materials Science
  • Chemical Engineering

Background:

  • Phase separation is a fundamental process in materials science.
  • The Lifshitz-Slyozov theory describes domain growth kinetics in systems undergoing phase separation.
  • Active Model B introduces self-propulsion to particles, influencing system dynamics.

Purpose of the Study:

  • To numerically investigate the effects of activity on the ordering kinetics of Active Model B.
  • To identify novel domain growth laws and scaling behaviors in active systems.

Main Methods:

  • Detailed numerical simulations of Active Model B.
  • Analysis of domain growth laws (L~t^x).
  • Examination of equal-time correlation functions and dynamical scaling.

Main Results:

  • Activity introduces a crossover in domain growth from L~t^{1/3} to L~t^{1/4} at late times.
  • Dynamical scaling is observed in the density field correlation function.
  • The scaling function is dependent on the activity strength (λ).

Conclusions:

  • Activity significantly modifies phase separation dynamics in Model B.
  • A new domain growth exponent (1/4) is identified for active systems.
  • Activity strength is a critical parameter influencing scaling behavior in active matter.