workbench_algorithms.utils.state_prep_utils

Utility functions for state prep.

get_angles

get_angles(amps, num_qubits=None)

Equations 5 and 8 in arXiv:0407010 .

Parameters:

Name	Type	Description	Default
`amps`	`list`	List of amplitudes.	required
`num_qubits`	`(Optional, int)`	Number of qubits the amps will be loaded to. Defaults to None.	`None`

Returns:

Type	Description
`(list, list)`	List of list of angles for \(Z\) rotations and list of list of angles for \(Y\) rotations.

get_gray_angles(angles)

Given list of angles for uniform rotations, return angles for single qubit rotations.

Follows equation 3 in arXiv:0407010 .

Parameters:

Name	Type	Description	Default
`angles`	`list`	List of angles.	required

Returns:

Type	Description
`list`	List of single qubit rotation angles.

Note

The "dot" in the equation is a bitwise dot product.

get_all_grays(angles)

Apply get_gray_angles to a list of lists of angles.

Parameters:

Name	Type	Description	Default
`angles`	`list`	List of list of angles	required

Returns:

Type	Description
`list`	List of list of single qubit gray angles

get_usp_angle(d)

Given a number of elements to produce a USP over d, calculate the rotation angle needed.