I The expected value (or mean) of X

[peace]

hi. How to obtain the expected value of x in the momentum space ?

 

[PeroK]

Looks like you have answered your own question.

 

[peace]

Looks like you have answered your own question.

I only have the result. But I don't have the perfect solution to tell me how to achieve that. I'm looking for a solution.

 

[PeroK]

I only have the result. But I don't have the perfect solution to tell me how to achieve that. I'm looking for a solution.

Whatever textbook you are learning QM from ought to have a derivation. If not, you should be able to find one online.

 

[peace]

Whatever textbook you are learning QM from ought to have a derivation. If not, you should be able to find one online.

In my textbook only the result has been written, and not the complete solution.
Yet, yes, you are right. I search for a complete solution online.

 

[PeroK]

In my textbook only the result has been written, and not the complete solution.
Yet, yes, you are right. I search for a complete solution online.

There's one here, for example.

https://physics.stackexchange.com/q...-the-momentum-representation-from-knowing-the

 

[peace]

There's one here, for example.

https://physics.stackexchange.com/q...-the-momentum-representation-from-knowing-the

thank you very much for your search for me.