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observable particle

См. также в других словарях:

  • Observable universe — For a general discussion of the universe, see Universe. Visualization of the 93 billion light year – or 28 billion parsec – three dimensional observable universe. The scale is such that the fine grains of light represent collections of large… …   Wikipedia

  • Observable — This article is about observables in physics. For the use of the term observable in control theory, see Observability. In physics, particularly in quantum physics, a system observable is a property of the system state that can be determined by… …   Wikipedia

  • Particle number — Conjugate variables of thermodynamics Pressure Volume (Stress) (Strain) Temperature Entropy Chemical potential Particle number The particle number (or number of particles) of a thermodynamic system …   Wikipedia

  • Particle horizon — NOTOC In physical cosmology, particle horizon is the maximum distance from which particles could have traveled to the observer in the age of the universe. It represents the portion of the universe which we could have conceivably observed at the… …   Wikipedia

  • Particle number operator — In quantum mechanics, for systems where the total number of particles may not be preserved, the number operator is the observable that counts the number of particles. The number operator acts on Fock space. Given a Fock state composed of single… …   Wikipedia

  • Virtual particle — In physics, a virtual particle is a particle that exists for a limited time and space, introducing uncertainty in their energy and momentum due to the Heisenberg Uncertainty Principle. (Indeed, because energy and momentum in quantum mechanics are …   Wikipedia

  • subatomic particle — or elementary particle Any of various self contained units of matter or energy. Discovery of the electron in 1897 and of the atomic nucleus in 1911 established that the atom is actually a composite of a cloud of electrons surrounding a tiny but… …   Universalium

  • elementary particle — n 1) any of the particles of which matter and energy are composed or which mediate the fundamental forces of nature esp one (as the photon or the electron) whose existence has not been attributed to the combination of other more fundamental… …   Medical dictionary

  • Quantum mechanics — For a generally accessible and less technical introduction to the topic, see Introduction to quantum mechanics. Quantum mechanics …   Wikipedia

  • Lambda-CDM model — Physical cosmology Universe · Big Bang …   Wikipedia

  • quantum mechanics — quantum mechanical, adj. Physics. a theory of the mechanics of atoms, molecules, and other physical systems that are subject to the uncertainty principle. Abbr.: QM Cf. nonrelativistic quantum mechanics, relativistic quantum mechanics. [1920 25]… …   Universalium

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