# Control

## Description

The Control node consists of a discretized control path, where the control points can be dragged to design a desired control path.

## Input

The node has the following input:

• Time (t): This input defines the scalar values for the time axis

## Content

The node shows the control path, and the spatial range can be specified in the $y_{min}$ and $y_{max}$ fields. The $Reset$ button takes one back to the default setting. In the $N_{params}$ content field, the desired number of control parameters can be entered.

## Output

• Control: This node outputs all the control values within the range of the discretized control path

## Example

In the example below, a control path is designed in the Control node to control a harmonic oscillator potential to achieve a desired state transfer from an initial to a target state. This state transfer can be observed in the State Comparison Plot node where the initial state (green dotted-curve) after time evolution can be compared with the target state (green dashed-curve).