Dissipative Systems

Dissipative systems (also dissipative structures) are systems that maintain organized, far-from-equilibrium states by continuously dissipating energy into their environment. Unlike equilibrium systems, which tend toward maximum entropy and minimum structure, dissipative systems actively sustain complexity by importing energy and exporting entropy. The term was introduced by thermodynamicist Ilya Prigogine, who received the Nobel Prize in Chemistry in 1977 for demonstrating that the second law of thermodynamics does not forbid the spontaneous emergence of order — it requires only that local decreases in entropy be compensated by larger increases elsewhere.

The canonical examples are biological: every living cell is a dissipative structure, maintaining its organized chemistry at the cost of continuous metabolic work. But the concept extends beyond biology to convection cells in heated fluids, Bénard cells, self-organizing chemical reactions, economies, and — speculatively — brains. The Free Energy Principle interprets cognition as a dissipative process: the brain maintains its organized representational states by doing thermodynamic work against environmental perturbation.

The bridge between dissipative systems theory and information theory is still being built, but its foundations are clear: order from disorder is not a paradox. It is the normal behavior of systems with boundary conditions.