ae_iterative_quantum_pe

This module contains necessary functions and classes to implement amplitude estimation algorithm using Iterative Quantum Phase Estimation (IQPE). The implementation is based on following paper:

Dobšíček, Miroslav and Johansson, Göran and Shumeiko, Vitaly and Wendin, Göran. Arbitrary accuracy iterative quantum phase estimation algorithm using a single ancillary qubit: A two-qubit benchmark. Physical Review A 3(76), 2007. https://arxiv.org/abs/quant-ph/0610214*

Author: Gonzalo Ferro Costas & Alberto Manzano Herrero

class QQuantLib.AE.ae_iterative_quantum_pe.IQPEAE(oracle: qat.lang.AQASM.QRoutine, target: list, index: list, **kwargs)

Class for using Iterative Quantum Phase Estimation (IQPE) class for doing Amplitude Estimation (AE)

Parameters:

  • oracle (QLM gate) – QLM gate with the Oracle for implementing the Grover operator

  • target (list of ints) – python list with the target for the amplitude estimation

  • index (list of ints) – qubits which mark the register to do the amplitude estimation

  • kwars (dictionary) – dictionary that allows the configuration of the IQPEAE algorithm: Implemented keys:

  • qpu (kwargs, QLM solver) – solver for simulating the resulting circutis

  • shots (kwargs, int) – number of measurements

  • mcz_qlm (kwargs, bool) – for using or not QLM implementation of the multi controlled Z gate

property index

creating index property

property oracle

creating oracle property

run()

run method for the class.

Returns:

the estimation of a

Return type:

result

Notes

\[a = \cos^2(\theta)\]

Where \(\theta\) is:

\[\mathcal{Q}|\Psi\rangle = e^{2i\theta}|\Psi\rangle\]

And \(\mathcal{Q}\) the Grover Operator

property target

creating target property