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Simetría de tornillo, hidrodinámica quiral e inestabilidad impar en colestericos activos
Gareth P Alexander1, S J Kole2,3, Ananyo Maitra4,5
1University of Warwick, Department of Physics, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom.
Physical review. E
|December 23, 2025
Resumen
Los colestericos activos exhiben quiralidad en estructura y tensión, lo que lleva a nuevas fuerzas de rizo e inestabilidades activas. Este estudio aclara su hidrodinámica y revela un nuevo mecanismo de inestabilidad impulsado por la simetría de tornillo.
Área de la Ciencia:
- Física de materia blanda
- Ciencia de materiales quirales
- Dinámica de fluidos
Sus antecedentes:
- Los colestericos activos poseen quiralidad tanto en la estructura como en las tensiones activas.
- La quiralidad en los materiales activos conduce a comportamientos hidrodinámicos complejos, incluidas las fuerzas de rizo.
- La comprensión de estos comportamientos es crucial para el desarrollo de nuevos materiales activos.
Objetivo del estudio:
- Derivar y aclarar la hidrodinámica de los colestericos activos con simetría continua de tornillo.
- Investigar el papel de la actividad quiral y la simetría de tornillo en las inestabilidades activas.
- Identificar nuevas inestabilidades activas distintas de los modelos existentes.
Principales métodos:
- Derivación de ecuaciones hidrodinámicas a partir de ecuaciones activas de Ericksen-Leslie utilizando un enfoque geométrico.
- Análisis de la estructura no lineal de la hidrodinámica activa.
- Linealización de la hidrodinámica de pseudocapa para estudiar las inestabilidades activas.
Principales resultados:
- Se aclaró la hidrodinámica de la simetría continua de tornillo en colestericos activos.
- Se identificaron fuerzas elásticas impares generalizadas que se originan en la energía libre de equilibrio.
- Se descubrió una nueva inestabilidad activa impulsada por actividad quiral antagónica y simetría de tornillo, con un umbral y vector de onda distintos.
Conclusiones:
- La simetría de tornillo en los colestericos activos genera contribuciones hidrodinámicas únicas e inestabilidades activas.
- Los hallazgos proporcionan información sobre el comportamiento de la materia activa quiral y sus aplicaciones potenciales.
- Este trabajo avanza la comprensión de la dinámica de fluidos activa y las transiciones de fase en sistemas quirales.
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