# Phase separation kinetics of 2-TIPS at low density: Cluster growth by ballistic agglomeration

Source: [Phase separation kinetics of 2-TIPS at low density: Cluster growth by ballistic agglomeration](<https://www.sota2.com/research/paper/694a21fb9eebe296e72aa648>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-12-24T05:00:04.857Z

Authors: Nayana Venkatareddy, Partha Sarathi Mondal, Shradha Mishra, Prabal K. Maiti

Published: 2025-12-21T06:20:14.000Z

## Abstract

We study the kinetics of two-temperature induced phase separation (2-TIPS) in dilute binary mixtures of active ("hot") and passive ("cold") particles using molecular dynamics simulations and a coarse-grained hydrodynamic model. Following a temperature quench, cold particles nucleate into mobile clusters that move ballistically and merge through successive coalescence events. The resulting domain growth exhibits dynamic scaling with a growth exponent of approximately 0.7, markedly faster than diffusive coarsening. We identify this regime as ballistic agglomeration of cold clusters, demonstrating a distinct nonequilibrium growth mechanism in low-density scalar active systems.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2512.18615>)

[PDF](<https://arxiv.org/pdf/2512.18615.pdf>)