def sq(a, b, c):
circ = Circuit(1)
if c != 0:
circ.Rz(c, 0)
if b != 0:
circ.Rx(b, 0)
if a != 0:
circ.Rz(a, 0)
return circ
def phi(qubits, alpha, n_qubits):
c = Circuit(n_qubits)
for i in range(len(qubits) - 1):
c.CX(qubits[i], qubits[i + 1])
c.Rz(qubits[-1], alpha)
for i in range(len(qubits) - 1):
c.CX(qubits[-i - 2], qubits[-i - 1])
return c
def test_transpile_grid_circuit(self):
c = Circuit()
qb = pytket._tket.circuit.Qubit("grid", 0, 0)
c.add_qubit(qb)
c.Rz(1, qb)
qsc = jaqal_circuit_from_tket_circuit(c)
jcirc = CircuitBuilder()
reg = jcirc.register("baseregister", 1)
reg2 = jcirc.map("grid0_0", reg, slice(0, 1, 1))
block = jcirc.block()
block.gate("prepare_all")
block.gate("Rz", reg2[0], pi)
block.gate("measure_all")
self.assertEqual(generate_jaqal_program(jcirc.build()),
generate_jaqal_program(qsc))
def test_transpile_1q_circuit(self):
c = Circuit(1, 1)
c.Rz(1, 0)
c.add_barrier([0])
c.Measure(0, 0)
qsc = jaqal_circuit_from_tket_circuit(c)
jcirc = CircuitBuilder()
reg = jcirc.register("baseregister", 1)
reg2 = jcirc.map("q", reg, slice(0, 1, 1))
block = jcirc.block()
block.gate("prepare_all")
block.gate("Rz", reg2[0], pi)
block = jcirc.block()
block.gate("measure_all")
self.assertEqual(generate_jaqal_program(jcirc.build()),
generate_jaqal_program(qsc))
def add_operator_term(circuit: Circuit, term: QubitPauliString, angle: float):
qubits = []
for q, p in term.to_dict().items():
if p != Pauli.I:
qubits.append(q)
if p == Pauli.X:
circuit.H(q)
elif p == Pauli.Y:
circuit.V(q)
for i in range(len(qubits) - 1):
circuit.CX(i, i + 1)
circuit.Rz(angle, len(qubits) - 1)
for i in reversed(range(len(qubits) - 1)):
circuit.CX(i, i + 1)
for q, p in term.to_dict().items():
if p == Pauli.X:
circuit.H(q)
elif p == Pauli.Y:
circuit.Vdg(q)
def pauli_evolution(pauli: List[Tuple[int, str]], coeff: complex, circ: Circuit):
"""Appends the evolution circuit corresponding to a given Pauli tensor
Args:
pauli:
coeff (complex):
circ (Circuit):
"""
# set up the correct basis
all_qbs = list(zip(*pauli))[0]
for qb_idx, p in pauli:
if p == 'X':
circ.H(qb_idx)
elif p == 'Y':
# angles in half-turns
circ.Rx(qb_idx, 0.5)
# cnot cascade
cx_qb_pairs = list(zip(sorted(all_qbs)[:-1], sorted(all_qbs)[1:]))
for pair in cx_qb_pairs:
circ.CX(pair[0], pair[1])
# rotation (convert angle from radians to half-turns)
circ.Rz(all_qbs[-1], (2 * coeff.imag) / PI)
# reverse cascade and revert basis
cx_qb_pairs = list(zip(sorted(all_qbs)[:-1], sorted(all_qbs)[1:]))
for pair in reversed(cx_qb_pairs):
circ.CX(pair[0], pair[1])
all_qbs = list(zip(*pauli))[0]
for qb_idx, p in pauli:
if p == 'X':
circ.H(qb_idx)
elif p == 'Y':
circ.Rx(qb_idx, -0.5)
backend = AerBackend() backend.compile_circuit(c) handle = backend.process_circuit(c, n_shots=2000) counts = backend.get_result(handle).get_counts() print(counts) # ## Statevector simulator usage from pytket import Circuit from pytket.extensions.qiskit import AerStateBackend # Build a quantum state: c = Circuit(3) c.H(0).CX(0, 1) c.Rz(0.3, 0) c.Rz(-0.3, 1) c.Ry(0.8, 2) # Examine the statevector: backend = AerStateBackend() backend.compile_circuit(c) handle = backend.process_circuit(c) state = backend.get_result(handle).get_state() print(state) # ## Expectation value usage from pytket import Circuit, Qubit from pytket.extensions.qiskit import AerBackend, AerStateBackend
