- #1
confused_man
- 16
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I'm trying to figure out how you would actually measure the result of a quantum gate. For example, suppose I build a Hadamard gate by using a beam splitter.
The output of this gate creates either [tex] |\psi> = \frac{1}{\sqrt{2}} |0> + \frac{1}{\sqrt{2}} |1> [/tex] or [tex] |\psi> = \frac{1}{\sqrt{2}} |0> - \frac{1}{\sqrt{2}} |1> [/tex] depending on if the input state was [tex] |\psi> = |0> [/tex] or [tex] |\psi> = |1> .[/tex]
So how would you measure this experimentally? I'm I know that you can set up photon detectors to measure photon counts going either through the beam splitter or reflected from it, but how would you actually see the effect of the minus sign?
Any insight would be greatly appreciated. Thanks!
The output of this gate creates either [tex] |\psi> = \frac{1}{\sqrt{2}} |0> + \frac{1}{\sqrt{2}} |1> [/tex] or [tex] |\psi> = \frac{1}{\sqrt{2}} |0> - \frac{1}{\sqrt{2}} |1> [/tex] depending on if the input state was [tex] |\psi> = |0> [/tex] or [tex] |\psi> = |1> .[/tex]
So how would you measure this experimentally? I'm I know that you can set up photon detectors to measure photon counts going either through the beam splitter or reflected from it, but how would you actually see the effect of the minus sign?
Any insight would be greatly appreciated. Thanks!