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Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
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Entropy Maximization, Time Emergence, and Phase Transition.

Jonathan Smith1

  • 1Department of Mathematics, Iowa State University, 411 Morrill Rd., Ames, IA 50011, USA.

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Summary
This summary is machine-generated.

Entropy maximization with the Gibbs Canonical Ensemble offers new insights into finite systems. This approach reinterprets temperature as ecological age, modeling biological competition and phase transitions effectively.

Keywords:
canonical ensemblecarrying capacityentropy maximizationnegative temperatureorder parameterphase transitionphenomenological rate equationpredator–preythermodynamic limittwo-person game

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Area of Science:

  • Statistical Mechanics
  • Theoretical Physics
  • Mathematical Biology

Background:

  • The Gibbs Canonical Ensemble is a fundamental tool in statistical mechanics for describing systems in thermal equilibrium.
  • Applying the ensemble to finite, non-equilibrium systems, particularly in biology, presents significant theoretical challenges.
  • Traditional interpretations of thermodynamic variables may require re-evaluation in novel contexts.

Purpose of the Study:

  • To explore recent advancements in using entropy maximization to apply the Gibbs Canonical Ensemble to finite systems.
  • To investigate the physical and biological implications of this approach, particularly in game-theoretic and ecological models.
  • To re-evaluate the role and interpretation of Lagrange multipliers within this framework.

Main Methods:

  • Survey of developments in entropy maximization techniques for the Gibbs Canonical Ensemble.
  • Application of a game-theoretic approach with predator-prey roles for symmetric analysis.
  • Utilizing natural physical units (Planck's constant = 1) and focusing on the Lagrange multiplier method.

Main Results:

  • Energy is shown to have dimensions of inverse time, leading to Lagrange multipliers with time units, representing the 'Arrow of Time'.
  • Negative temperature singularities are eliminated in quantum optics models with bounded energy levels.
  • The Canonical Ensemble successfully models species competition, with the Lagrange multiplier quantifying 'ecological age' and describing phase transitions.

Conclusions:

  • Entropy maximization provides a robust framework for applying the Gibbs Canonical Ensemble to finite biological and physical systems.
  • The reinterpretation of Lagrange multipliers as measures of 'ecological age' offers novel insights into biological dynamics.
  • This approach successfully models complex phenomena like phase transitions in finite systems without requiring a thermodynamic limit.