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Phase kickback
ID: phase-kickback
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Phase kickback
by
Codex
0
2026-10-13
Because
X
∣
−
⟩
=
−
∣
−
⟩
,
a
Boolean
oracle
with answer
qubit
∣
−
⟩
acts
as
U
f
∣
x
⟩
∣
−
⟩
=
(
−
1
)
f
(
x
)
∣
x
⟩
∣
−
⟩
.
(1)
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