Entropy (disambiguation)

Entropy is a scientific concept that is most commonly associated with a state of disorder, randomness, or uncertainty.

Entropy may also refer to:

Thermodynamics and statistical mechanics [ edit ]

Entropy (classical thermodynamics) , thermodynamic entropy in macroscopic terms, with less emphasis on the statistical explanation
- Entropic force . The product of temperature and the gradient of the entropy density is viewed an effective force, yielding a gradient in the energy density of a system.
- Entropy production . Development of entropy in a thermodynamic system.
Entropy (statistical thermodynamics) , the statistical explanation of thermodynamic entropy based on probability theory
- Configuration entropy , the entropy change due to a change in the knowledge of the position of particles, rather than their momentum
- Conformational entropy , the entropy change due to a change in the "configuration" of a particle (e.g. a right-handed vs. a left-handed polyatomic molecule)
Tsallis entropy , a generalization of Boltzmann-Gibbs entropy
von Neumann entropy , entropy in quantum statistical physics and quantum information science

Introduction to entropy an explanation on entropy as a measure of irreversibility
Entropy (order and disorder) , the relationship of disorder with heat and work
Entropy in thermodynamics and information theory , the relationship between thermodynamic entropy and information (Shannon) entropy
Entropy (energy dispersal) , dispersal of energy as a descriptor of entropy

History of entropy
Entropy and life , the relationship between the thermodynamic entropy and the evolution of life
Entropy (astrophysics) , the adiabatic constant

Entropy (information theory) , also called Shannon entropy, a measure of the unpredictability or information content of a message source
Differential entropy , a generalization of Entropy (information theory) to continuous random variables
- Entropy of entanglement , related to the Shannon and von Neumann entropies for entangled systems; reflecting the degree of entanglement of subsystems
Algorithmic entropy an (incomputable) measure of the information content of a particular message
Renyi entropy , a family of diversity measures generalising Shannon entropy; used to define fractal dimensions
Measure theoretic entropy , a measure of exponential growth in dynamical systems; equivalent to the rate of increase of Shannon entropy of a trajectory in trajectory-space
Topological entropy , a measure of exponential growth in dynamical systems; equivalent to the rate of increase of α->0 Renyi entropy of a trajectory in trajectory-space.
Topological entropy in physics
Volume entropy , a Riemannian invariant measuring the exponential rate of volume growth of a Riemannian metric
Maximum entropy (disambiguation)
Graph entropy , a measure of the information rate achievable by communicating symbols over a channel in which certain pairs of values may be confused.

Entropy encoding , data compression strategies to produce a code length equal to the entropy of a message
Entropy (computing) , an indicator of the number of random bits available to seed cryptography systems
Entropy (anesthesiology) , a measure of a patient's cortical function, based on the mathematical entropy of EEG signals
Entropy (ecology) , measures of biodiversity in the study of biological ecology, based on Shannon and Renyi entropies
Social entropy , a measure of the natural decay within a social system

Entropy (board game)
Entropy (video game)
Entropy or Alchemiss, a character in Freedom Force vs the 3rd Reich
N. Tropy, a character from Crash Bandicoot: Warped
Entropy: Zero , a Source mod for Half-Life 2 released in 2017 developed by Breadman
Entropy: Zero 2 , a sequel to Entropy: Zero released in 2022
Entropy: Zero - Uprising , a mod of Entropy: Zero developed by Employee8 and Filipad

Entropy (choreography) , the difference between a transcription and a performance

Entropy (package manager) , a Sabayon Linux package manager
Information entropy, relating to disruptive actions taken in Internet vigilantism