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Swap test
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Controlled unitary gate
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Words: 14
The swap test on pure states
∣
a
⟩
,
∣
b
⟩
returns ancilla zero with probability
p
0
=
2
1
(
1
+
∣
⟨
a
∣
b
⟩
∣
2
)
.
(63)
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(5)
Controlled unitary gate
Quantum theory
Branch of physics
Physics
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