| 单词 | unitary symmetry |
| 释义 | > as lemmasunitary symmetry unitary symmetry n. Physics invariance under a unitary group, esp. a group consisting of all unitary matrices of a given size and having determinants equal to one; (in later use) a model which approximates the strong interactions of elementary particles by means of such invariance. ΘΚΠ the world > matter > physics > quantum theory > quantum mechanics > matrix mechanics > [noun] > unitary matrix > group of > symmetry of unitary symmetry1961 1961 Nuovo Cimento 21 872 Recent papers have dealt with the introduction of unitary symmetry, i.e. invariance under the three-dimensional unitary group. 1966 Illus. London News 4 June 22/4 There is a scheme, called unitary symmetry, which groups many of the known particles in patterns and can predict where others may be found. 2011 O. M. Boyarkin Adv. Particle Physics I. ix. 165 The above-mentioned considerations apply only to the idealized case of the exact unitary symmetry. In reality, the SU(3)-symmetry is very approximate. < as lemmas |
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