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Q30.Bernstein-Vazirani 2-Bit Hidden String s = "10"PremiumHard

Q30.Bernstein-Vazirani 2-Bit Hidden String s = "10"Premium Question

Quantum ParallelismQubits: 3Q
Find the secret 2-bit string s=10s = 10 with a single quantum query on 3 qubits (Q0, Q1 inputs, Q2 ancilla).
Target Objective:
Prepare Q2 in ∣−⟩|-\rangle, put Q0,Q1 in ∣+⟩|+\rangle, apply CNOT(0->2) for s0=1s_0=1 and no gate for s1=0s_1=0, and decode with Hadamards on Q0,Q1 to measure 101.
Judge Acceptance Criteria:

Measurement probability for designated basis state must reach ≥ 95%.

Gates:
q[0]|0⟩
S0
S1
S2
S3
S4
S5
S6
S7
q[1]|0⟩
S0
S1
S2
S3
S4
S5
S6
S7
q[2]|0⟩
S0
S1
S2
S3
S4
S5
S6
S7
Click slot to place selected gate. Right-click to remove.0 gates in circuit
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