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Results tagged with symmetry
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user 190551
Symmetries play a big role in modern physics and have been a source of powerful tools and techniques for understanding theories and their dynamics. We say that something is symmetric if there is some transformation we can perform on that object that leaves some property unchanged. The set of symmetry transformations of an object forms a group, and the name of this group is used as the name of the symmetry of the object.
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Point out the wrong sentence about many identical particles systems
When going to 3, I guess they mean that, if you have a set of symmetry operators $\Lambda_i$, then a completely symmetrical state would be the one that is an eigenstate of all the symmetry operators $\ … Since a symmetry operator commutes with the Hamiltonian, it will also commute with the evolution operator and thus an eigenstate of all the symmetry operators will keep being symmetrical in time. …
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What is the reverse operation of gauging a global symmetry?
As far as I understand, gauging a global symmetry means taking a model with a global symmetry and transforming it into a model such that the previous symmetry group is now the gauge symmetry of your new … Given a model with a gauge (local) symmetry, is there any way to transform it into a model with a global symmetry?
As an example, let's say we have a model with a $SU(N)$ gauge symmetry. …