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

 * 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

Introductory articles

 * 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

Other aspects

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

Information theory and mathematics

 * 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
 * Rényi 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.

Other uses in science and technology

 * 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 Rényi entropies
 * Social entropy, a measure of the natural decay within a social system

Film and television

 * Entropy (film), a 1999 film by Phil Joanou
 * "Entropy" (Buffy episode), 2002
 * "Entropy", an episode of Criminal Minds season 11

Games

 * 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

Literature

 * Entropy: A New World View, a book by Jeremy Rifkin and Ted Howard
 * "Entropy", a 1960 short story by Thomas Pynchon
 * "Entropy", a 1995 short story by Leanne Frahm
 * Entropy (journal), a scientific journal published by MDPI
 * Entropy (magazine), an online literary magazine

Music

 * Entropy, a 2005 album by Anathallo and Javelins
 * Entropy / Send Them, an EP by DJ Shadow and the Groove Robbers
 * "Entropy", a song by Bad Religion from Against the Grain
 * "Entropy", a song by Kelly Osbourne from Sleeping in the Nothing
 * "Entropy", a song by VNV Nation from Matter + Form
 * "Entropy", a song by Moxy Früvous from The 'b' Album
 * "Entropy", a song by Brymo from Oṣó
 * "Entropy", a song by Daniel Caesar from Case Study 01
 * "Entropy", a song by MC Hawking
 * "Entropy", a song by Grimes and Bleachers
 * Entropia (album), an album by Pain of Salvation
 * Entropy, a track by Nigel Stanford
 * The Book Of Us: Entropy, an album by DAY6

Other uses in arts and entertainment

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

Other uses

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