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advanced_tools:group_theory:representation_theory:dual_representation [2022/07/03 20:36] edi [Concrete] |
advanced_tools:group_theory:representation_theory:dual_representation [2022/07/03 20:38] edi [Concrete] |
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**Example** | **Example** | ||
- | The diagram below shows the defining representation of $SU(2)$ in its upper branch. To construct the dual representation, we let it act on the dual vector space, that is, the space of covectors. In this example, the dual representation is the same as the complex-conjugate representation. Moreover, the defining and complex-conjugate representations of $SU(2)$ are equivalent, that is, there is a similarity transformation that takes one to the other. | + | The diagram below shows the defining representation of $SU(2)$ in its upper branch. To construct the dual representation, we let it act on the dual vector space, that is, the space of covectors. In this example, the dual representation is the same as the complex-conjugate representation ($\tilde{U}=U^*$). Moreover, the defining and complex-conjugate representations of $SU(2)$ are equivalent, that is, there is a similarity transformation that takes one to the other. |
[{{ :advanced_tools:group_theory:representation_theory:su2_dual.jpg?nolink }}] | [{{ :advanced_tools:group_theory:representation_theory:su2_dual.jpg?nolink }}] |