Wave function,probability,normalization,etc.

  • Thread starter Thread starter prehisto
  • Start date Start date
  • Tags Tags
    Wave
Click For Summary

Homework Help Overview

The discussion revolves around the normalization of a wave function in quantum mechanics, specifically the function f(px) = N * exp(-αpx). Participants are tasked with normalizing this wave function, finding the probability distribution, and calculating the average value and dispersion for px.

Discussion Character

  • Exploratory, Assumption checking, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to determine the normalization constant N by setting up the integral for normalization. They express concern about the outcome of their calculations, questioning whether their result of -N^2 = 1 could be correct.
  • Some participants question the validity of the integral, suggesting that it diverges and prompting a reconsideration of the function's form, including the possibility of missing a square or absolute value.

Discussion Status

Participants are actively engaging with the problem, with some providing guidance on the normalization condition and pointing out potential issues with the integral's divergence. There is no explicit consensus yet, as multiple interpretations of the problem are being explored.

Contextual Notes

There is a mention of a lack of additional examples or context, which may affect the understanding of the problem. The original poster is encouraged to verify the source of their function for any missing elements that could impact the normalization process.

prehisto
Messages
111
Reaction score
0

Homework Statement


-∞<pi<∞
N-normalization multiple

f(px)=N*exp(-[itex]\alpha[/itex]px)
1)normalize wave function to 1
2) find probability distrubution px
2) find avarage value and dispersion for px

Homework Equations



So for normalization i have to find N value when [itex]\int[/itex] (from -∞ to ∞)[N*exp(-[itex]\alpha[/itex]px)]^2=1
Am I right ?
either way when I am tried to solve this integral, i obtained -> -N^2=1
Could it be right ?

The Attempt at a Solution


 
Physics news on Phys.org
Your integral diverges, are you sure there's no square or absolute value involved?
 
Goddar said:
Your integral diverges, are you sure there's no square or absolute value involved?

Right now i have only this example ,checked - there is nothing more to it.
I will check the source and let you know.
 
prehisto said:

Homework Statement


-∞<pi<∞
N-normalization multiple

f(px)=N*exp(-[itex]\alpha[/itex]px)
1)normalize wave function to 1
2) find probability distrubution px
2) find avarage value and dispersion for px

Homework Equations




The Attempt at a Solution



So for normalization i have to find N value when [itex]\int[/itex] (from -∞ to ∞)[N*exp(-[itex]\alpha[/itex]px)]^2=1
Am I right?
Yes, that would be the normalization condition.

Either way when I tried to solve this integral, I obtained -> -N^2=1
Could it be right ?
No. First, as Goddar noted, the integral you wrote down diverges. Second, even if it didn't, your N would cause the integral to be negative, not +1.
 

Similar threads

  • · Replies 19 ·
Replies
19
Views
3K
  • · Replies 2 ·
Replies
2
Views
3K
Replies
7
Views
3K
  • · Replies 20 ·
Replies
20
Views
4K
  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 6 ·
Replies
6
Views
4K
  • · Replies 3 ·
Replies
3
Views
2K
Replies
1
Views
2K