ControlledRotation user defined type

Namespace: Microsoft.Quantum.MachineLearning

Package: Microsoft.Quantum.MachineLearning

Describes a controlled rotation in terms of its target and control indices, rotation axis, and index into a model parameter vector.

newtype ControlledRotation = ((TargetIndex : Int, ControlIndices : Int[]), Axis : Pauli, ParameterIndex : Int);

Named Items

TargetIndex : Int

Index of the target qubit for this controlled rotation.

ControlIndices : Int[]

An array of the control qubit indices for this rotation.

Axis : Pauli

The axis for this rotation.

ParameterIndex : Int

An index into a model parameter vector describing the angle for this rotation.

Example

The following represents a rotation about the $X$-axis of the first qubit in a register, controlled on the second qubit, and with an angle given by the fourth parameter in a sequential model:

let controlledRotation = ControlledRotation(
    (0, [1]),
    PauliX,
    3
)

Remarks

An uncontrolled rotation can be represented by setting ControlIndices to an empty array of indexes, new Int[0].