# Stark effect

1. Jul 7, 2007

### kingOFleo

Hi Here is my question,

Consider stark effect for n=3 states of hydrogen there are nine degenerate states ?3lm(neglect spin),We turn on
an electric field in Z direction.
a)construct 9 x 9 matrix representing perturbing hamiltonian.

b)find eigen values and their degeneracies.

2. Jul 7, 2007

### malawi_glenn

noone will ever help you unless you show some work and what relationships you know etc.

And why answer you at you mail?

3. Jul 7, 2007

### kingOFleo

why no one will ever help me

which work do u want and what relationships you want etc.

4. Jul 7, 2007

### malawi_glenn

It is how things work in these forums, it is the rules that you give your work done so far, thougts, and relevant forumlas etc in order to get helt.

Thats why the standard

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

Is given before you write something new here.

5. Jul 7, 2007

### kingOFleo

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Last edited: Jul 7, 2007
6. Jul 7, 2007

### kingOFleo

this the coding done in html
copy and paste this in txt file and save with .html extension

7. Jul 7, 2007

### lalbatros

What is the meaning of all this BS?
What is your starting point for calculating the interaction with the electric field?
What are the pedagogical aims of this exercice: just making a big calculation based on hydrogen wavefunctions, or exploring the effect of symmetries and a simple application of group theory (wigner-eckart)?
What is the context?
Are you supposed to calculate the level displacements as a function of the electric field and to compare with experimental data?
For the eigenvalues, do you mean the eigenvalue of the pertubation or of the perturbed hamiltonian?
Are you going to calculate that numerically of to calculate first order perturbation (may be this is the purpose of this exercice?).

Sorry but if you are lazy, I will be too.
This is a very nice exercice, you should spend a lot of time on that to enjoy.

Last edited: Jul 7, 2007
8. Jul 7, 2007

### kingOFleo

help ASAP

can any one do this question or not ?
i m new to this topic , can't any one hlp me .
no one there for my hlp?

9. Jul 7, 2007

### malawi_glenn

we still dont know what you know so far, and where you are stuck.

10. Jul 7, 2007

### kingOFleo

hlp

i hve missed my classes due medical reasons , so dont know anything abt this topic and has to complete this question as homework
now can any body help me
pleawse slove it ASAP

11. Jul 7, 2007

### malawi_glenn

Sorry but it is not how things work in these forums, that we give away solutions just like that.

What are you sources of information for this problem? Have you asked your teacher for information?

12. Jul 7, 2007

### kingOFleo

sources of information for this problemis my teacher
asked my teacher for information but she refused to help me

13. Jul 9, 2007

### kingOFleo

help ASAP

i need the solution quickly , as the last date for submittion is aproching

14. Jul 9, 2007

### lalbatros

We don't know the level of your course, or the aim of the exercice.
I told you to explain us more about that.
There are many different ways to solve this question.

A very simple and elementary way is to calculate the matrix elements directly from the n=3 wavefunctions (see there for example: http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/hydwf.html )

I assume you at least know the form of the pertubation to add to the hamiltonian!

15. Jul 10, 2007

### kingOFleo

the level of my course is graduation
my frnd gave me this gave as hint.

the partial answer is given as <300|Z|310>=-3sqrt(6)a.
<310|Z|320|=-3sqrt(3)a.
<31(+ 0r -)1|Z|32(+0r-)1>.
=-4.5a

16. Jul 10, 2007

### lalbatros

well,
write Z explicitely,
plug the wavefunctions from the link I provided,
calculate all the needed matrix elements,
use the first order perturbation theory,
or solve exactly by numerical diagonalisation

then learn quantum mechanics to understand the meaning of your calculations

Last edited: Jul 11, 2007
17. Jul 10, 2007

### kingOFleo

i cant understand you