- #1
formodular
- 34
- 18
Hello!
On page 51 where he want to invert
$$\Lambda^{\mu}_{\nu} = \tfrac{1}{2} \text{tr}( \bar{\sigma}^{\mu}A \sigma_{\nu} A^{\dagger})$$
the person says we may use
$$\sigma_{\nu} A^{\dagger} \bar{\sigma}^{\nu} = 2 \text{tr}(A^{\dagger})I.$$
to do that ... how do you prove this formula?
I have one method which is not good at all, and he does not even prove it so it may be very simple and so I hope you can see it and explain
On page 51 where he want to invert
$$\Lambda^{\mu}_{\nu} = \tfrac{1}{2} \text{tr}( \bar{\sigma}^{\mu}A \sigma_{\nu} A^{\dagger})$$
the person says we may use
$$\sigma_{\nu} A^{\dagger} \bar{\sigma}^{\nu} = 2 \text{tr}(A^{\dagger})I.$$
to do that ... how do you prove this formula?
I have one method which is not good at all, and he does not even prove it so it may be very simple and so I hope you can see it and explain