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Efecto concurrente del desorden en la separación de fases en sistemas activos
Pratikshya Jena1, Shambhavi Dikshit1, Shradha Mishra1
1Indian Institute of Technology (BHU), Varanasi 221005, India.
Physical review. E
|February 20, 2026
Resumen
El trastorno de fijación aleatoria en partículas autopropulsadas puede inducir la separación de fase y la detención cinética. Incluso un trastorno débil altera el comportamiento de fase en comparación con la separación de fase inducida por la motilidad típica, lo que afecta la dinámica de las partículas.
Área de la Ciencia:
- Física de la materia blanda Física de la materia blanda
- Mecánica estadística La mecánica estadística.
- Sistemas de no equilibrio Sistemas sin equilibrio
Sus antecedentes:
- Las partículas autopropulsadas (SPP) exhiben comportamientos emergentes complejos.
- La separación de fase inducida por la motilidad (MIPS) es un fenómeno clave en la materia activa.
- El papel del desorden apagado en los sistemas SPP no se entiende completamente.
Objetivo del estudio:
- Investigar el impacto del trastorno al azar fijado en SPPs.
- Caracteriza las transiciones de fase y las estructuras emergentes en sistemas SPP desordenados.
- Determinar cómo el desorden afecta la separación de fases y la dinámica de partículas.
Principales métodos:
- Desarrolló un modelo de continuo utilizando ecuaciones hidrodinámicas acopladas para la densidad y el momento.
- Empleó simulaciones numéricas para explorar el espacio de fase.
- Utilizó la aproximación linealizada para la construcción del diagrama de fases.
- Factor de estructura analizado y dimensión fractal para cuantificar las interfaces.
Principales resultados:
- El trastorno débil induce la separación de fases en densidades y actividades más bajas que las típicas MIPS.
- El aumento del desorden conduce a la separación de microfasas, la heterogeneidad y la detención cinética.
- El desorden fuerte aumenta la rugosidad de la interfaz de dominio y suprime las fluctuaciones numéricas.
- El análisis de la dimensión fractal revela una creciente irregularidad de los dominios separados por fases.
Conclusiones:
- El trastorno de fijación aleatoria altera significativamente el comportamiento de fase de las SPP.
- El desorden puede impulsar la separación de fases y detener la dinámica, ofreciendo nuevas rutas para controlar la materia activa.
- El estudio proporciona un diagrama de fase y información sobre las propiedades de la interfaz en sistemas activos desordenados.
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