Python QuantumCircuit.s方法代碼示例

# 需要導入模塊: from qiskit import QuantumCircuit [as 別名]
# 或者: from qiskit.QuantumCircuit import s [as 別名]
def trial_circuit_computational(n, state, meas_string = None, measurement = True):
    """Trial function for classical optimization problems.

    n = number of qubits
    state = a bit string for the state prepared.
    meas_string = the pauli to be measured
    measurement = true/false if measurement is to be done
    """
    q = QuantumRegister("q", n)
    c = ClassicalRegister("c", n)
    trial_circuit = QuantumCircuit(q, c)
    if meas_string is None:
        meas_string = [None for x in range(n)]
    if len(state) == n:
        for j in range(n):
            if state[n-j-1] == "1":
                trial_circuit.x(q[j])
        trial_circuit.barrier(q)
        for j in range(n):
            if meas_string[j] == 'X':
                trial_circuit.h(q[j])
            elif meas_string[j] == 'Y':
                trial_circuit.s(q[j]).inverse()
                trial_circuit.h(q[j])
        if measurement:
            for j in range(n):
                trial_circuit.measure(q[j], c[j])
    return trial_circuit

# 需要導入模塊: from qiskit import QuantumCircuit [as 別名]
# 或者: from qiskit.QuantumCircuit import s [as 別名]
def trial_circuit_ryrz(n, m, theta, entangler_map, meas_string=None,
                       measurement=True):
    """Creates a QuantumCircuit object ocnsisting in layers of
    parametrized single-qubit Y and Z rotations and CZ two-qubit gates

    Args:
        n (int) : number of qubits
        m (int) : depth of the circuit
        theta array[float] : angles that parametrize the Y and Z rotations
        entangler_map : CZ connectivity, e.g. {0: [1], 1: [2]}
        meas_string (str) : measure a given Pauli operator at the end of the
            circuit
        measurement (bool) : whether to measure the qubit (register "q")
            on classical bits (register "c")
    Returns:
        A QuantumCircuit object
    """
    q = QuantumRegister("q", n)
    c = ClassicalRegister("c", n)
    trial_circuit = QuantumCircuit(q, c)
    trial_circuit.h(q)
    if meas_string is None:
        meas_string = [None for x in range(n)]
    for i in range(m):
        trial_circuit.barrier(q)
        for node in entangler_map:
            for j in entangler_map[node]:
                trial_circuit.cz(q[node], q[j])
        for j in range(n):
            trial_circuit.ry(theta[n * i * 2 + 2 * j], q[j])
            trial_circuit.rz(theta[n * i * 2 + 2 * j + 1], q[j])
    trial_circuit.barrier(q)
    for j in range(n):
        if meas_string[j] == 'X':
            trial_circuit.h(q[j])
        elif meas_string[j] == 'Y':
            trial_circuit.s(q[j]).inverse()
            trial_circuit.h(q[j])
    if measurement:
        for j in range(n):
            trial_circuit.measure(q[j], c[j])
    return trial_circuit

# 需要導入模塊: from qiskit import QuantumCircuit [as 別名]
# 或者: from qiskit.QuantumCircuit import s [as 別名]
def trial_circuit_ryrz(n, m, theta, entangler_map, meas_string = None, measurement = True):
    """Trial function for classical optimization problems.

    n = number of qubits
    m = depth
    theta = control vector of size n*m*2 stacked as theta[n*i*2+2*j+p] where j
    counts the qubits and i the depth and p if y and z.
    entangler_map = {0: [2, 1],
                     1: [2],
                     3: [2],
                     4: [2]}
    control is the key and values are the target
    pauli_string = length of number of qubits string
    """
    q = QuantumRegister("q", n)
    c = ClassicalRegister("c", n)
    trial_circuit = QuantumCircuit(q, c)
    trial_circuit.h(q)
    if meas_string is None:
        meas_string = [None for x in range(n)]
    for i in range(m):
        trial_circuit.barrier(q)
        for node in entangler_map:
            for j in entangler_map[node]:
                trial_circuit.cz(q[node], q[j])
        for j in range(n):
            trial_circuit.ry(theta[n * i * 2 + 2*j], q[j])
            trial_circuit.rz(theta[n * i * 2 + 2*j + 1], q[j])
    trial_circuit.barrier(q)
    for j in range(n):
        if meas_string[j] == 'X':
            trial_circuit.h(q[j])
        elif meas_string[j] == 'Y':
            trial_circuit.s(q[j]).inverse()
            trial_circuit.h(q[j])
    if measurement:
        for j in range(n):
            trial_circuit.measure(q[j], c[j])
    return trial_circuit

# 需要導入模塊: from qiskit import QuantumCircuit [as 別名]
# 或者: from qiskit.QuantumCircuit import s [as 別名]
class TestStandard1Q(StandardExtensionTest):
    """Standard Extension Test. Gates with a single Qubit"""

    def setUp(self):
        self.q = QuantumRegister(3, "q")
        self.r = QuantumRegister(3, "r")
        self.c = ClassicalRegister(3, "c")
        self.circuit = QuantumCircuit(self.q, self.r, self.c)
        self.c_header = 69  # lenght of the header

    def test_barrier(self):
        self.circuit.barrier(self.q[1])
        qasm_txt = 'barrier q[1];'
        self.assertResult(Barrier, qasm_txt, qasm_txt)

    def test_barrier_invalid(self):
        c = self.circuit
        self.assertRaises(QISKitError, c.barrier, self.c[0])
        self.assertRaises(QISKitError, c.barrier, self.c)
        self.assertRaises(QISKitError, c.barrier, (self.q, 3))
        self.assertRaises(QISKitError, c.barrier, (self.q, 'a'))
        self.assertRaises(QISKitError, c.barrier, 0)

    def test_barrier_reg(self):
        self.circuit.barrier(self.q)
        qasm_txt = 'barrier q[0],q[1],q[2];'
        self.assertResult(Barrier, qasm_txt, qasm_txt)

    def test_barrier_None(self):
        self.circuit.barrier()
        qasm_txt = 'barrier q[0],q[1],q[2],r[0],r[1],r[2];'
        self.assertResult(Barrier, qasm_txt, qasm_txt)

    def test_ccx(self):
        self.circuit.ccx(self.q[0], self.q[1], self.q[2])
        qasm_txt = 'ccx q[0],q[1],q[2];'
        self.assertResult(ToffoliGate, qasm_txt, qasm_txt)

    def test_ccx_invalid(self):
        c = self.circuit
        self.assertRaises(QISKitError, c.ccx, self.c[0], self.c[1], self.c[2])
        self.assertRaises(QISKitError, c.ccx, self.q[0], self.q[0], self.q[2])
        self.assertRaises(QISKitError, c.ccx, 0, self.q[0], self.q[2])
        self.assertRaises(QISKitError, c.ccx, (self.q, 3), self.q[1], self.q[2])
        self.assertRaises(QISKitError, c.ccx, self.c, self.q, self.q)
        self.assertRaises(QISKitError, c.ccx, 'a', self.q[1], self.q[2])

    def test_ch(self):
        self.circuit.ch(self.q[0], self.q[1])
        qasm_txt = 'ch q[0],q[1];'
        self.assertResult(CHGate, qasm_txt, qasm_txt)

    def test_ch_invalid(self):
        c = self.circuit
        self.assertRaises(QISKitError, c.ch, self.c[0], self.c[1])
        self.assertRaises(QISKitError, c.ch, self.q[0], self.q[0])
        self.assertRaises(QISKitError, c.ch, 0, self.q[0])
        self.assertRaises(QISKitError, c.ch, (self.q, 3), self.q[0])
        self.assertRaises(QISKitError, c.ch, self.c, self.q)
        self.assertRaises(QISKitError, c.ch, 'a', self.q[1])

    def test_crz(self):
        self.circuit.crz(1, self.q[0], self.q[1])
        self.assertResult(CrzGate, 'crz(1) q[0],q[1];', 'crz(-1) q[0],q[1];')

    def test_crz_invalid(self):
        c = self.circuit
        self.assertRaises(QISKitError, c.crz, 0, self.c[0], self.c[1])
        self.assertRaises(QISKitError, c.crz, 0, self.q[0], self.q[0])
        self.assertRaises(QISKitError, c.crz, 0, 0, self.q[0])
        # TODO self.assertRaises(QISKitError, c.crz, self.q[2], self.q[1], self.q[0])
        self.assertRaises(QISKitError, c.crz, 0, self.q[1], self.c[2])
        self.assertRaises(QISKitError, c.crz, 0, (self.q, 3), self.q[1])
        self.assertRaises(QISKitError, c.crz, 0, self.c, self.q)
        # TODO self.assertRaises(QISKitError, c.crz, 'a', self.q[1], self.q[2])

    def test_cswap(self):
        self.circuit.cswap(self.q[0], self.q[1], self.q[2])
        qasm_txt = 'cx q[2],q[1];\nccx q[0],q[1],q[2];\ncx q[2],q[1];'
        self.assertResult(FredkinGate, qasm_txt, qasm_txt)

    def test_cswap_invalid(self):
        c = self.circuit
        self.assertRaises(QISKitError, c.cswap, self.c[0], self.c[1], self.c[2])
        self.assertRaises(QISKitError, c.cswap, self.q[1], self.q[0], self.q[0])
        self.assertRaises(QISKitError, c.cswap, self.q[1], 0, self.q[0])
        self.assertRaises(QISKitError, c.cswap, self.c[0], self.c[1], self.q[0])
        self.assertRaises(QISKitError, c.cswap, self.q[0], self.q[0], self.q[1])
        self.assertRaises(QISKitError, c.cswap, 0, self.q[0], self.q[1])
        self.assertRaises(QISKitError, c.cswap, (self.q, 3), self.q[0], self.q[1])
        self.assertRaises(QISKitError, c.cswap, self.c, self.q[0], self.q[1])
        self.assertRaises(QISKitError, c.cswap, 'a', self.q[1], self.q[2])

    def test_cu1(self):
        self.circuit.cu1(1, self.q[1], self.q[2])
        self.assertResult(Cu1Gate, 'cu1(1) q[1],q[2];', 'cu1(-1) q[1],q[2];')

    def test_cu1_invalid(self):
        c = self.circuit
        self.assertRaises(QISKitError, c.cu1, self.c[0], self.c[1], self.c[2])
#.........這裏部分代碼省略.........

# 需要導入模塊: from qiskit import QuantumCircuit [as 別名]
# 或者: from qiskit.QuantumCircuit import s [as 別名]
class CircuitBackend(UnrollerBackend):
    """Backend for the unroller that produces a QuantumCircuit.

    By default, basis gates are the QX gates.
    """

    def __init__(self, basis=None):
        """Setup this backend.

        basis is a list of operation name strings.
        """
        super().__init__(basis)
        self.creg = None
        self.cval = None
        if basis:
            self.basis = basis
        else:
            self.basis = ["cx", "u1", "u2", "u3"]
        self.gates = {}
        self.listen = True
        self.in_gate = ""
        self.circuit = QuantumCircuit()

    def set_basis(self, basis):
        """Declare the set of user-defined gates to emit.

        basis is a list of operation name strings.
        """
        self.basis = basis

    def version(self, version):
        """Ignore the version string.

        v is a version number.
        """
        pass

    def new_qreg(self, name, size):
        """Create a new quantum register.

        name = name of the register
        sz = size of the register
        """
        assert size >= 0, "invalid qreg size"
        q_register = QuantumRegister(size, name)
        self.circuit.add(q_register)

    def new_creg(self, name, size):
        """Create a new classical register.

        name = name of the register
        sz = size of the register
        """
        assert size >= 0, "invalid creg size"
        c_register = ClassicalRegister(size, name)
        self.circuit.add(c_register)

    def define_gate(self, name, gatedata):
        """Define a new quantum gate.

        We don't check that the definition and name agree.

        name is a string.
        gatedata is the AST node for the gate.
        """
        self.gates[name] = gatedata

    def _map_qubit(self, qubit):
        """Map qubit tuple (regname, index) to (QuantumRegister, index)."""
        qregs = self.circuit.get_qregs()
        if qubit[0] not in qregs:
            raise BackendError("qreg %s does not exist" % qubit[0])
        return (qregs[qubit[0]], qubit[1])

    def _map_bit(self, bit):
        """Map bit tuple (regname, index) to (ClassicalRegister, index)."""
        cregs = self.circuit.get_cregs()
        if bit[0] not in cregs:
            raise BackendError("creg %s does not exist" % bit[0])
        return (cregs[bit[0]], bit[1])

    def _map_creg(self, creg):
        """Map creg name to ClassicalRegister."""
        cregs = self.circuit.get_cregs()
        if creg not in cregs:
            raise BackendError("creg %s does not exist" % creg)
        return cregs[creg]

    def u(self, arg, qubit, nested_scope=None):
        """Fundamental single qubit gate.

        arg is 3-tuple of Node expression objects.
        qubit is (regname,idx) tuple.
        nested_scope is a list of dictionaries mapping expression variables
        to Node expression objects in order of increasing nesting depth.
        """
        if self.listen:
            if "U" not in self.basis:
                self.basis.append("U")

#.........這裏部分代碼省略.........