Natural networks as thermodynamic systems

作者：Hartonen Tuomo; Annila Arto^*

来源：Complexity, 2012, 18(2): 53-62.

DOI：10.1002/cplx.21428

• entropy
• evolution
• free energy
• natural process
• noncomputable
• power law scaling
• scale-free
• statistical mechanics
• the principle of least action

Natural networks are considered as thermodynamic systems that evolve from one state to another by consuming free energy. The least-time consumption of free energy is found to result in ubiquitous scale-free characteristics. The network evolution will yield the scale-independent qualities because the least-time imperative will prefer attachment of nodes that contribute most to the free-energy consumption. The analysis of evolutionary equation of motion, derived from statistical physics of open systems, reveals that evolution of natural networks is a path-dependent and nondeterministic process. Despite the noncomputability of evolution, many mathematical models of networks can be recognized as approximations of the least-time process as well as many measures of networks can be appreciated as practical assessments of the system%26apos;s thermodynamic status.

• 出版日期2012-12