def time_evolution_operator(n_qubits, a_idx, t, hamiltonian, n_trotter_step):
circuit = QuantumCircuit(n_qubits)
n_terms = hamiltonian.get_term_count()
for _ in range(n_trotter_step):
for i in range(n_terms):
pauli_term = hamiltonian.get_term(i)
c = pauli_term.get_coef()
pauli_ids = pauli_term.get_pauli_id_list()
pauli_indices = pauli_term.get_index_list()
param = -c * t / n_trotter_step
circuit.add_multi_Pauli_rotation_gate(pauli_indices, pauli_ids,
angle)
return circuit
def _try_append_gate(self, op: ops.GateOperation,
qulacs_circuit: qulacs.QuantumCircuit,
indices: np.array):
# One qubit gate
if isinstance(op.gate, ops.pauli_gates._PauliX):
qulacs_circuit.add_X_gate(indices[0])
elif isinstance(op.gate, ops.pauli_gates._PauliY):
qulacs_circuit.add_Y_gate(indices[0])
elif isinstance(op.gate, ops.pauli_gates._PauliZ):
qulacs_circuit.add_Z_gate(indices[0])
elif isinstance(op.gate, ops.common_gates.HPowGate):
qulacs_circuit.add_H_gate(indices[0])
elif isinstance(op.gate, ops.common_gates.XPowGate):
qulacs_circuit.add_RX_gate(indices[0], -np.pi * op.gate._exponent)
elif isinstance(op.gate, ops.common_gates.YPowGate):
qulacs_circuit.add_RY_gate(indices[0], -np.pi * op.gate._exponent)
elif isinstance(op.gate, ops.common_gates.ZPowGate):
qulacs_circuit.add_RZ_gate(indices[0], -np.pi * op.gate._exponent)
elif isinstance(op.gate, ops.SingleQubitMatrixGate):
mat = op.gate._matrix
qulacs_circuit.add_dense_matrix_gate(indices[0], mat)
elif isinstance(op.gate, circuits.qasm_output.QasmUGate):
lmda = op.gate.lmda
theta = op.gate.theta
phi = op.gate.phi
gate = qulacs.gate.U3(indices[0], theta * np.pi, phi * np.pi,
lmda * np.pi)
qulacs_circuit.add_gate(gate)
# Two qubit gate
elif isinstance(op.gate, ops.common_gates.CNotPowGate):
if op.gate._exponent == 1.0:
qulacs_circuit.add_CNOT_gate(indices[0], indices[1])
else:
mat = _get_google_rotx(op.gate._exponent)
gate = qulacs.gate.DenseMatrix(indices[1], mat)
gate.add_control_qubit(indices[0], 1)
qulacs_circuit.add_gate(gate)
elif isinstance(op.gate, ops.common_gates.CZPowGate):
if op.gate._exponent == 1.0:
qulacs_circuit.add_CZ_gate(indices[0], indices[1])
else:
mat = _get_google_rotz(op.gate._exponent)
gate = qulacs.gate.DenseMatrix(indices[1], mat)
gate.add_control_qubit(indices[0], 1)
qulacs_circuit.add_gate(gate)
elif isinstance(op.gate, ops.common_gates.SwapPowGate):
if op.gate._exponent == 1.0:
qulacs_circuit.add_SWAP_gate(indices[0], indices[1])
else:
qulacs_circuit.add_dense_matrix_gate(indices, op._unitary_())
elif isinstance(op.gate, ops.parity_gates.XXPowGate):
qulacs_circuit.add_multi_Pauli_rotation_gate(
indices, [1, 1], -np.pi * op.gate._exponent)
elif isinstance(op.gate, ops.parity_gates.YYPowGate):
qulacs_circuit.add_multi_Pauli_rotation_gate(
indices, [2, 2], -np.pi * op.gate._exponent)
elif isinstance(op.gate, ops.parity_gates.ZZPowGate):
qulacs_circuit.add_multi_Pauli_rotation_gate(
indices, [3, 3], -np.pi * op.gate._exponent)
elif isinstance(op.gate, ops.TwoQubitMatrixGate):
indices.reverse()
mat = op.gate._matrix
qulacs_circuit.add_dense_matrix_gate(indices, mat)
# Three qubit gate
"""
# deprecated because these functions cause errors in gpu
elif isinstance(op.gate, ops.three_qubit_gates.CCXPowGate):
mat = _get_google_rotx(op.gate._exponent)
gate = qulacs.gate.DenseMatrix(indices[2], mat)
gate.add_control_qubit(indices[0],1)
gate.add_control_qubit(indices[1],1)
qulacs_circuit.add_gate(gate)
elif isinstance(op.gate, ops.three_qubit_gates.CCZPowGate):
mat = _get_google_rotz(op.gate._exponent)
gate = qulacs.gate.DenseMatrix(indices[2], mat)
gate.add_control_qubit(indices[0],1)
gate.add_control_qubit(indices[1],1)
qulacs_circuit.add_gate(gate)
"""
elif isinstance(op.gate, ops.three_qubit_gates.CSwapGate):
mat = np.zeros(shape=(4, 4))
mat[0, 0] = 1
mat[1, 2] = 1
mat[2, 1] = 1
mat[3, 3] = 1
gate = qulacs.gate.DenseMatrix(indices[1:], mat)
gate.add_control_qubit(indices[0], 1)
qulacs_circuit.add_gate(gate)
# Misc
elif protocols.has_unitary(op):
indices.reverse()
mat = op._unitary_()
qulacs_circuit.add_dense_matrix_gate(indices, mat)
# Not unitary
else:
return False
return True