- #1
hellomister
- 29
- 0
Homework Statement
Find the commutator [tex]
\left[\hat{p_{x}},\hat{p_{y}}\right]
[/tex]
Homework Equations
[tex] \hat{p_{x}}=\frac{\hbar}{i}\frac{\partial}{\partial x} [/tex]
[tex] \hat{p_{y}}=\frac{\hbar}{i}\frac{\partial}{\partial y} [/tex]
The Attempt at a Solution
[tex][\hat{p}_{x}, \hat{p}_{y}]=\hat{p}_{x}\hat{p}_{y}-\hat{p}_{y}\hat{p}_{x}[/tex]
[tex]=\frac{\hbar}{i}\frac{\partial}{\partial x}\frac{\hbar}{i}\frac{\partial}{\partial y}-\frac{\hbar}{i}\frac{\partial}{\partial y}\frac{\hbar}{i}\frac{\partial}{\partial x}[/tex]
[tex]=(\frac{\hbar}{i})^2\frac{\partial^2}{\partial x\partial y}-(\frac{\hbar}{i})^2\frac{\partial^2}{\partial y\partial x}[/tex]
Is this the correct commutator? I don't know what else I can do to further complete this. Any help is appreciated.