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词汇 Global symmetry
分类 英语词汇 英语翻译词典
释义

Global symmetry

英语百科

Global symmetry

In physics, a global symmetry is a symmetry that holds at all points in the spacetime under consideration, as opposed to a local symmetry which varies from point to point.

Global symmetries require conservation laws, but not forces, in physics.

An example of a global symmetry is the action of the U(1)=e^{iq\theta} (for \theta a constant - making it a global transformation) group on the Dirac Lagrangian:

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