French
Languages
English
Bengali
French
German
Japanese
Korean
Portuguese
Spanish
Tamil

Code source de qiskit.circuit.quantumregister

# This code is part of Qiskit.
#
# (C) Copyright IBM 2017.
#
# This code is licensed under the Apache License, Version 2.0. You may
# obtain a copy of this license in the LICENSE.txt file in the root directory
# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
#
# Any modifications or derivative works of this code must retain this
# copyright notice, and modified files need to carry a notice indicating
# that they have been altered from the originals.

"""
Quantum register reference object.
"""
import itertools

from qiskit.circuit.exceptions import CircuitError
from .register import Register
from .bit import Bit


[docs]class Qubit(Bit): """Implement a quantum bit.""" __slots__ = () def __init__(self, register=None, index=None): """Creates a qubit. Args: register (QuantumRegister): Optional. A quantum register containing the bit. index (int): Optional. The index of the bit in its containing register. Raises: CircuitError: if the provided register is not a valid :class:`QuantumRegister` """ if register is None or isinstance(register, QuantumRegister): super().__init__(register, index) else: raise CircuitError( "Qubit needs a QuantumRegister and %s was provided" % type(register).__name__ )
[docs]class QuantumRegister(Register): """Implement a quantum register.""" # Counter for the number of instances in this class. instances_counter = itertools.count() # Prefix to use for auto naming. prefix = "q" bit_type = Qubit
[docs] def qasm(self): """Return OPENQASM string for this register.""" return "qreg %s[%d];" % (self.name, self.size)
[docs]class AncillaQubit(Qubit): """A qubit used as ancillary qubit.""" __slots__ = () pass
[docs]class AncillaRegister(QuantumRegister): """Implement an ancilla register.""" # Counter for the number of instances in this class. instances_counter = itertools.count() # Prefix to use for auto naming. prefix = "a" bit_type = AncillaQubit