Qpe

qpe

Functions:

Name	Description
qpe_flexible	[Qmod Classiq-library function]
qpe	[Qmod Classiq-library function]

qpe_flexible

qpe_flexible(
    unitary_with_power: QCallable[CInt], phase: QArray[QBit]
) -> None

[Qmod Classiq-library function]

Implements the Quantum Phase Estimation (QPE) algorithm, which estimates the phase (eigenvalue) associated with an eigenstate of a given unitary operator \(U\). This is a flexible version that allows the user to provide a callable that generates the unitary operator \(U^k\) for a given integer \(k\), offering greater flexibility in handling different quantum circuits using some powering rule.

Parameters:

Name	Type	Description	Default
unitary_with_power	QCallable[CInt]	A callable that returns the unitary operator \(U^k\) given an integer \(k\). This callable is used to control the application of powers of the unitary operator.	required
phase	QArray[QBit]	The quantum variable that represents the estimated phase (eigenvalue), assuming initialized to zero.	required

qpe

qpe(unitary: QCallable, phase: QNum) -> None

[Qmod Classiq-library function]

Implements the standard Quantum Phase Estimation (QPE) algorithm, which estimates the phase (eigenvalue) associated with an eigenstate of a given unitary operator \(U\).

Parameters:

Name	Type	Description	Default
unitary	QCallable	A callable representing the unitary operator \(U\), whose eigenvalue is to be estimated.	required
phase	QNum	The quantum variable that represents the estimated phase (eigenvalue), assuming initialized to zero.	required