Código fuente para qiskit_finance.circuit.library.probability_distributions.uniform

# This code is part of a Qiskit project.
# (C) Copyright IBM 2017, 2023.
# 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.

"""The uniform probability distribution circuit."""

from qiskit.circuit import QuantumCircuit

[documentos]class UniformDistribution(QuantumCircuit): r"""A circuit to encode a discretized uniform distribution in qubit amplitudes. This simply corresponds to applying Hadamard gates on all qubits. The probability density function of the discretized uniform distribution on :math:`N` values is .. math:: \mathbb{P}(X = x) = \frac{1}{N}. This circuit considers :math:`N = 2^n`, where :math:`n =` ``num_qubits`` and prepares the state .. math:: \mathcal{P}_X |0\rangle^{\otimes n} = \frac{1}{\sqrt{2^n}} \sum_{x=0}^{2^n - 1} |x\rangle Examples: >>> from qiskit_finance.circuit.library.probability_distributions import UniformDistribution >>> circuit = UniformDistribution(3) >>> circuit.decompose().draw() ┌───┐ q_0: ┤ H ├ ├───┤ q_1: ┤ H ├ ├───┤ q_2: ┤ H ├ └───┘ """ def __init__(self, num_qubits: int, name: str = "P(X)") -> None: """ Args: num_qubits: The number of qubits in the circuit, the distribution is uniform over ``2 ** num_qubits`` values. name: The name of the circuit. """ inner = QuantumCircuit(num_qubits, name=name) inner.h(inner.qubits) super().__init__(num_qubits, name=name) self.append(inner.to_gate(), inner.qubits)