May 7, 2015

Homework Help: Physics

Posted by unknown on Sunday, February 24, 2013 at 8:50pm.

Alice and Bob share a state a|++⟩+b|−−⟩, where the first qubit is Alice's and the second qubit is Bob's. Alice measures her qubit in the standard basis and sends the measurement outcome to Bob. If Bob wants a|+⟩+b|−⟩, what gate does he apply to his qubit in the following two cases? Choose your answer from I,X,Z,H.

When Alice's outcome was 0:
When Alice's outcome was 1:

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