If you check where an electron is every second, its quantum properties change. It's like a child playing hide-and-seek but constantly being called by name: they freeze and stop running. In the particle world, such a "caller" is a measurement. It prevents particles from freely forming a shared quantum state, or entanglement.
Physicists investigated what happens when you add chaotic disturbances to such a system — for example, random defects in the crystal where electrons live. It was previously unclear whether disturbances would break the transition between different types of entanglement. The authors built a mathematical model and saw: disturbances only slightly tweak the parameters but can neither create nor destroy the transition. In a two-dimensional film or a three-dimensional piece of material, the transition remains: entanglement either decays quickly with distance (like ripples on water) or decays more slowly, following a special law. In a one-dimensional chain (say, a row of atoms) entanglement always decays quickly, and disturbances change nothing here.
Computer simulations confirmed the conclusion: in a one-dimensional chain, even without disturbances, entanglement behaves the same — decaying quickly if the chain is long enough. Previously, it seemed that in clean systems it might be different, but new calculations with large chains showed: no, the behavior is the same. Disorder is neither enemy nor friend: it's just a passenger on this quantum train.
In the quantum world, observation itself changes the object. If you look at a particle too often, it stops "feeling" its neighbors and behaves like a loner.