Qft¶
Here are a couple of functions that implement the quantum fourier transform:
As the conditional rotations are defined by a parameter k we have a convenience function for this: theta = (+/-) 2pi/2^(|k|) :param k: the integer for the angle :return: the angle |
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Applies the Quantum Fourier Transform to q :param self: the circuit to which the qft is applied :param q: the quantum register or list of quantum register/index tuples :return: the circuit with applied qft |
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Applies the inverse Quantum Fourier Transform to q :param self: the circuit to which the qft_dag is applied :param q: the quantum register or list of quantum register/index tuples :return: the circuit with applied qft_dag |
See below for a description of the different functions to apply a quantum fourier transform
get_theta¶
qft¶
qft_dg¶
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dc_qiskit_algorithms.Qft.qft_dg(self, q)[source]¶ Applies the inverse Quantum Fourier Transform to q :param self: the circuit to which the qft_dag is applied :param q: the quantum register or list of quantum register/index tuples :return: the circuit with applied qft_dag
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dc_qiskit_algorithms.Qft.get_theta(k)[source]¶ As the conditional rotations are defined by a parameter k we have a convenience function for this: theta = (+/-) 2pi/2^(|k|) :param k: the integer for the angle :return: the angle
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class
dc_qiskit_algorithms.Qft.QuantumFourierTransformGate(num_qubits)[source]¶ -
inverse()[source]¶ Invert this instruction.
If the instruction is composite (i.e. has a definition), then its definition will be recursively inverted.
Special instructions inheriting from Instruction can implement their own inverse (e.g. T and Tdg, Barrier, etc.)
- Returns
a fresh instruction for the inverse
- Return type
qiskit.circuit.Instruction
- Raises
CircuitError – if the instruction is not composite and an inverse has not been implemented for it.
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