Skip to main content
Problem List
Q14.Maximally Entangled Bell Pair |Φ+⟩Medium

Q14.Maximally Entangled Bell Pair |Φ+⟩

Quantum EntanglementQubits: 2Q
Construct the canonical Bell state Φ+=12(00+11)|\Phi^+\rangle = \frac{1}{\sqrt{2}}(|00\rangle + |11\rangle) on 2 qubits initialized to 00|00\rangle.
Target Objective:
Use a Hadamard and a two-qubit entangling gate (CNOT) to create perfect quantum correlation where measuring one qubit determines the other.
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
Click slot to place selected gate. Right-click to remove.0 gates in circuit
Click "Submit" in the top bar to run automated test cases against your circuit.