KNOT: Knots and topological transformations in vibrating chains
How knots tied in metal chains untie themselves when vibrated is way to study how important
macromolecules such as polymers and DNA tangle and untangle. Nontrivial knots of one-dimensional objects only exist in three spatial dimensions, which may explain why our universe has three dimensions.
In this seemly simple experiment you will explore the challenging mechanics and thermodynamics of linear chains. The experiment is originally based on Knots and
Random Walks in Vibrated Granular Chains, E. Ben-Naim et al., Phys. Rev. Lett. 86 (2001) 1414.