- #1
Wan Anavan
- 2
- 1
- Homework Statement
- Analysis of Angular Momentum
- Relevant Equations
- Commutators
is my solution correct?
Last edited:
A Simple angular momentum analysis question (check my solution please)
- Thread starter Wan Anavan
- Start date
Click For Summary
The discussion revolves around verifying a solution related to angular momentum commutation relations. The initial solution contained a sign error in the commutation relations, which was later corrected. Participants emphasized the importance of careful calculations and explicitly writing out steps instead of relying on shortcuts. Ultimately, the correct answer was confirmed after thorough verification. The conversation included light-hearted banter but remained focused on the mathematical accuracy of the solution.
is my solution correct?
- #2
BvU
Science Advisor
Homework Helper
- 16,213
- 4,925
Not the way you write it. $$[L_x,L_y]=-i\hbar L_z$$
[edit] Sorry for confusing you. I made (a single) a sign error too !
The intention was to write $$[L_x,L_y]=\ \ \ i\hbar L_z\\ \ [L_y,L_x]=-i\hbar L_z$$
Two wrongs doesn't make a right
Last edited:
- #3
- 29,404
- 21,099
Wan Anavan said:
You are not being careful enough. You must write out more steps as you're going wrong with the shortcuts.
Last edited:
- #4
BvU
Science Advisor
Homework Helper
- 16,213
- 4,925
No. Write out ##L_+## and ##L_-## and explicitly multiply
- #5
Wan Anavan
- 2
- 1
BvU said:
PeroK said:
then the answer is not zero
- #6
BvU
Science Advisor
Homework Helper
- 16,213
- 4,925
This time answer and solution are correct.
You can check yourself by working out ##\Bigl [L_+,L_-\Bigr ]##
You can check yourself by working out ##\Bigl [L_+,L_-\Bigr ]##
- #7
berkeman
Admin
- 69,299
- 24,521
[ hijack ]
[ /hijack ]
LOL. Shouldn't that be "Too wrongs doesn't make a right"?BvU said:
[ /hijack ]
Similar threads
- · Replies 0 ·
- · Replies 1 ·
Undergrad
Properties of angular momentum
- · Replies 6 ·
- · Replies 1 ·
- · Replies 2 ·
- · Replies 2 ·
- · Replies 18 ·