Covariant Derivative: What Is $\nabla^0 A_{\alpha}$?

S.P.P
Messages
39
Reaction score
0
just a quick query, I know that,

\nabla_0 A_{\alpha}= \partial_0 A_{\alpha} - \Gamma^{\beta}_{0 \alpha} A_{\beta}

But what does
\nabla^0 A_{\alpha} equal?
 
Physics news on Phys.org
Since \nabla^0A_\alpha = g^{0\beta}\nabla_\beta A_\alpha you have

\nabla^0A_\alpha = g^{0\beta}\partial_\beta A_\alpha - g^{0\beta}\Gamma^{\gamma}_{\phantom{\gamma}\alpha\beta}A_\gamma
 
You're welcome.
 
shoehorn said:
You're welcome.

Don't take it personally, it's rare to get thanked for help here.
 
Thread 'Need help understanding this figure on energy levels'
This figure is from "Introduction to Quantum Mechanics" by Griffiths (3rd edition). It is available to download. It is from page 142. I am hoping the usual people on this site will give me a hand understanding what is going on in the figure. After the equation (4.50) it says "It is customary to introduce the principal quantum number, ##n##, which simply orders the allowed energies, starting with 1 for the ground state. (see the figure)" I still don't understand the figure :( Here is...
Thread 'Understanding how to "tack on" the time wiggle factor'
The last problem I posted on QM made it into advanced homework help, that is why I am putting it here. I am sorry for any hassle imposed on the moderators by myself. Part (a) is quite easy. We get $$\sigma_1 = 2\lambda, \mathbf{v}_1 = \begin{pmatrix} 0 \\ 0 \\ 1 \end{pmatrix} \sigma_2 = \lambda, \mathbf{v}_2 = \begin{pmatrix} 1/\sqrt{2} \\ 1/\sqrt{2} \\ 0 \end{pmatrix} \sigma_3 = -\lambda, \mathbf{v}_3 = \begin{pmatrix} 1/\sqrt{2} \\ -1/\sqrt{2} \\ 0 \end{pmatrix} $$ There are two ways...
Back
Top