Anomalous Fluctuations and Crystallization in Active Matter

Erscheinungsjahr 2026
ISBN: 978-981-958184-9
Verlag: Springer Nature Singapore

Buch, Englisch, 212 Seiten, Format (B × H): 155 mm x 235 mm

Reihe: Springer Theses

This book presents theoretical analyses and numerical simulations of fluctuations and crystallization in simple active matter systems. It begins with a comprehensive review of models of self-propelled particles, the common features of fluctuations in active fluids, and crystalline order in two-dimensional active solids. After presenting numerical results based on simple particle models, a fluctuating hydrodynamic theory derived via a bottom-up approach is developed to analyze density fluctuations in active fluids. This theory provides a unified explanation for anomalous density fluctuations, such as giant density fluctuations in active Brownian particles and hyperuniformity in chiral active particles, observed in both numerical simulations and previous experiments. The book further investigates the effects of chirality on the crystallization of active particles, demonstrating that chiral self-propulsion stabilizes crystalline order and can induce long-range order even in two dimensions, in contrast to typical behaviors in equilibrium systems. Overall, it offers a detailed numerical analysis of anomalous fluctuations and their impact on crystallization arising from nonequilibrium nature, as well as a theoretical framework that captures these phenomena for a broad class of active matter systems.

Zielgruppe

Research

Autoren/Hrsg.

Kuroda, Yuta

Weitere Mitwirkende

Miyazaki, Kunimasa

Fachgebiete

• Naturwissenschaften Physik Thermodynamik Festkörperphysik, Kondensierte Materie
• Naturwissenschaften Physik Angewandte Physik Statistische Physik, Dynamische Systeme
• Naturwissenschaften Physik Mechanik
• Interdisziplinäres Wissenschaften Wissenschaften: Forschung und Information Kybernetik, Systemtheorie, Komplexe Systeme

Inhaltsverzeichnis

Introduction.- Self-Propelled Particles.- Active Fluids.- Fluctuations in Equilibrium Fluids.- Fluctuations in Active Fluids.- Anomalous Fluctuations in Fluid Phase of Active Brownian Particles,- Microscopic Theory for Hyperuniformity in Two-Dimensional Chiral Active Fluids.- Singular Density Correlation in Three-Dimensional Chiral Active Fluids.- Active Solids.- Crystalline Order of Nonequilibrium Solids.- Long-Range Translational Order in Two-Dimensional Chiral Active Crystal.- Summary and Outlook.

Über Autor(innen)

Yuta Kuroda holds his Bachelor of Science in Physics from Kwansei Gakuin University and his Master of Science in Physics from Nagoya University. He received his Ph.D. in Physics from Nagoya University in 2025. During his doctoral program, he was awarded a JSPS (Japan Society for the Promotion of Science) research fellowship (DC2). Following his Ph.D., he has been serving as a JSPS overseas research fellow at the University of Stuttgart in Germany. His work is concerned with fluctuations in nonequilibrium fluids, phase transitions, and the modeling of soft and living matter. His doctoral work focused on fluctuations in active fluids and crystalline order in chiral active matter.