University of Amsterdam Researchers Show Motion Prevents Order in Active Matter Systems

A team of researchers from the University of Amsterdam (UvA) has revealed that the internal activity of certain materials can prevent them from forming ordered structures, a phenomenon observed in many physical systems. This research focuses on active matter systems, which exhibit distinct behaviors compared to their passive counterparts.

When passive, string-like objects are gathered in sufficient quantities, they naturally begin to align with one another, leading to a form of self-organization. This intrinsic tendency towards order is a well-understood principle in physics.

However, this self-organization process becomes considerably more difficult when the objects are active, such as microscopic worms or bacteria found in biological environments like the gut. The constant, self-driven motion inherent to these active entities introduces complexities that challenge the formation of stable, aligned structures.

The UvA researchers have specifically demonstrated that this activity can fundamentally alter one of the most important phase transitions within soft matter physics. This alteration suggests that the dynamic nature of active components plays a crucial role in preventing the kind of macroscopic order seen in passive systems.

The findings indicate that the presence of motion acts as a disruptive force, hindering the ability of active matter to spontaneously organize into larger, coherent structures. This distinction underscores a significant difference in how order and disorder emerge in passive versus active material systems.

According to Phys.org, this research provides insights into the unique challenges of self-organization in active matter and its implications for soft matter physics.