# Multiplet

Multiplet

In group theory, a multiplet is formally a group representation of an algebra.[citation needed]

In physics, multiplet can mean:

The best known example is a spin multiplet, which is a group representation of an SU(2) subgroup of the Lorentz algebra. For example, a spin singlet is a trivial representation, a spin doublet is a fundamental representation and a spin triplet is a vector representation.

In other cases, the term multiplet usually refers to the fundamental representation of a gauge algebra. For example, in QCD, quarks are in a multiplet of SU(3).

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• multiplet — MULTIPLÉT, multipleţi, s.m. (fiz.) Grup de linii spectrale cu frecvenţe foarte apropiate. – Din fr. multiplet. Trimis de ana zecheru, 26.05.2004. Sursa: DEX 98 ﻿ multiplét s. m. (sil. plet), pl. multipléţi Trimis de siveco, 10.08.2004. Sursa:… …   Dicționar Român

• multiplet — [ myltiplɛ ] n. m. • 1932; de multiple 1 ♦ Techn. Ensemble de raies voisines dans un spectre d absorption ou d émission. 2 ♦ Opt. Ensemble de plusieurs lentilles formant un système centré. 3 ♦ Phys. Ensemble de niveaux d énergie atomique ou… …   Encyclopédie Universelle

• multiplet — [mul′tə plət] n. [ MULTIPL(E) + ET] Physics 1. a set of quantum mechanical states related to each other whose single energy level can be split into a specific number of distinct energy levels 2. a line in a spectrum composed of a group of related …   English World dictionary

• multiplet — multipletas statusas T sritis fizika atitikmenys: angl. multiplet vok. Multiplett, n rus. мультиплет, m pranc. multiplet, m …   Fizikos terminų žodynas

• multiplet — /mul teuh plet , plit/, n. Physics. a group of several related spectral lines, usually of nearly the same wavelengths. Also called multiplet line. [1920 25; MULTI + (TRI)PLET] * * * …   Universalium

• multiplet — multipletas statusas T sritis chemija apibrėžtis Kataliziškai aktyvus centras, susidedantis iš kelių katalizatoriaus atomų. atitikmenys: angl. multiplet rus. мультиплет …   Chemijos terminų aiškinamasis žodynas

• multiplet — multipletas statusas T sritis chemija apibrėžtis Suskilusi spektro linija ar smailė. atitikmenys: angl. multiplet rus. мультиплет …   Chemijos terminų aiškinamasis žodynas

• multiplet — I. ˈməltəplə̇t noun ( s) Etymology: International Scientific Vocabulary multiple (I) + et : a spectrum line having several components II. noun 1 …   Useful english dictionary

• multiplet — noun Date: 1922 1. a spectrum line having several components 2. a group of elementary particles that are different in charge but similar in other properties (as mass) …   New Collegiate Dictionary

• multiplet — noun a) A spectral line that has multiple components b) A compound peak produced in several forms of spectroscopy …   Wiktionary