3 p = -|+ z >< +z[ + 1 | – z >< -z| 4

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M6
a) Given the density operator
3
1
| + z >< +z|+
– z >< -z|
4
p =
4
construct the density matrix.
b) Is this a mixed state or a pure state?
How can you tell?
c) Find <Sx> and <Sz>.
Transcribed Image Text:a) Given the density operator 3 1 | + z >< +z|+ – z >< -z| 4 p = 4 construct the density matrix. b) Is this a mixed state or a pure state? How can you tell? c) Find <Sx> and <Sz>.
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