def test_num_mcx_ancillas(self):
"""Test the number of ancilla bits for the mcx gate in zero_reflection."""
#
# q_0: ──■──────────────────────
# │
# q_1: ──■──────────────────────
# │
# q_2: ──┼────■─────────────────
# │ │
# q_3: ──┼────■─────────────────
# ┌─┴─┐ │
# q_4: ┤ X ├──┼────■────────────
# └───┘┌─┴─┐ │
# q_5: ─────┤ X ├──■────────────
# ┌───┐├───┤┌─┴─┐┌───┐┌───┐
# q_6: ┤ X ├┤ H ├┤ X ├┤ H ├┤ X ├
# └───┘└───┘└───┘└───┘└───┘
oracle = QuantumCircuit(7)
oracle.x(6)
oracle.h(6)
oracle.ccx(0, 1, 4)
oracle.ccx(2, 3, 5)
oracle.ccx(4, 5, 6)
oracle.h(6)
oracle.x(6)
grover_op = GroverOperator(oracle, reflection_qubits=[0, 1])
self.assertEqual(grover_op.width(), 7)
def test_num_mcx_ancillas(self):
"""Test the number of ancilla bits for the mcx gate in zero_reflection."""
oracle = QuantumCircuit(7)
oracle.x(6)
oracle.h(6)
oracle.ccx(0, 1, 4)
oracle.ccx(2, 3, 5)
oracle.ccx(4, 5, 6)
oracle.h(6)
oracle.x(6)
grover_op = GroverOperator(oracle, reflection_qubits=[0, 1])
self.assertEqual(grover_op.width(), 7)
