Abstract
We propose a method to calculate the size of the cooperatively rearranging region (CRR), NCRR, from the free energy landscape. In the free energy landscape picture, the particles in the CRR correspond to those involved in determinig the saddle point between two adjacent basins. By using this method, we estimate NCRR of the 3‐D random configuration of hard spheres. We also find that the system can transit to the adjacent basin via the lower height of the saddle point by the string motion.
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