👉 Percolation is a fundamental concept in statistical physics and computer science, which describes the behavior of systems that are close to but not fully occupied by any particles. The term "percolation" refers to the phenomenon where a system becomes more likely to be filled with particles as it approaches its critical point, characterized by large fluctuations of energy or occupation numbers. In percolation theory, the critical point is defined as the point at which the energy density of the system starts to decrease, and the