Posted by qwerty on Sunday, February 17, 2013 at 4:18pm.
Suppose we have two qubits in the state α00⟩+β11⟩.
(a) If we measure the fi rst qubit in the sign basis, what is the probability of seeing a +?
(b) What is the resulting state of the second qubit in that case?

Quantum Physics  Anonymous, Sunday, February 17, 2013 at 9:13pm
a) 1/2
b)a,b
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