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Q20.3-Qubit GHZ |GHZ-⟩ State with Negative PhaseMedium

Q20.3-Qubit GHZ |GHZ-⟩ State with Negative Phase

Quantum EntanglementQubits: 3Q
Prepare the state ∣GHZ−⟩=12(∣000⟩−∣111⟩)|\text{GHZ}^-\rangle = \frac{1}{\sqrt{2}}(|000\rangle - |111\rangle) across 3 qubits.
Target Objective:
Combine a Pauli-Z phase flip with the GHZ cascade circuit to induce destructive relative phase on ∣111⟩|111\rangle.
Judge Acceptance Criteria:

Statevector fidelity must reach ≥ 99.9% with the target unitary solution.

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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