- #1
raisin_raisin
- 27
- 0
A few months ago I wrote this line down, but it does not seem to follow any more. Am I mistaking a mistake now or when I first wrote it down? thanks
[tex] ( | 0 \rangle \langle 0 | + | 1 \rangle \langle 1 |) \rho ( | 0 \rangle \langle 0 | + | 1 \rangle \langle 1 |) [/tex]
[tex]= | 0 \rangle \langle 0 | \rho | 0 \rangle \langle 0 | + | 1 \rangle \langle 1 | \rho | 1 \rangle \langle 1 | [/tex]
where [tex]\rho[/tex] is an arbitrary mixed state.
(It is not letting me preview my latex so fingers crossed this works as expected)
[tex] ( | 0 \rangle \langle 0 | + | 1 \rangle \langle 1 |) \rho ( | 0 \rangle \langle 0 | + | 1 \rangle \langle 1 |) [/tex]
[tex]= | 0 \rangle \langle 0 | \rho | 0 \rangle \langle 0 | + | 1 \rangle \langle 1 | \rho | 1 \rangle \langle 1 | [/tex]
where [tex]\rho[/tex] is an arbitrary mixed state.
(It is not letting me preview my latex so fingers crossed this works as expected)