> ## Documentation Index
> Fetch the complete documentation index at: https://prod-mint.classiq.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Amplitude Loading

Functions:

| Name                     | Description                       |
| ------------------------ | --------------------------------- |
| `assign_amplitude_table` | \[Qmod Classiq-library function]. |

### assign\_amplitude\_table

<pre><code>assign\_amplitude\_table(
amplitudes: list\[float],
index: Const\[QArray],
indicator: QBit
) -> None</code></pre>

\[Qmod Classiq-library function]

Load a specified list of real amplitudes into a quantum variable using an extra indicator qubit:
( |i\rangle|0\rangle \rightarrow a(i)\ |i\rangle|1\rangle + \sqrt{1 - a(i)^2}\ |i\rangle|0\rangle ).
Here, (a(i)) is the i-th amplitude, determined by the QNum when the index is in state (i).
A list extracted from a given classical function (f(x)), with indexing according to a given QNum, can be obtained via the utility SDK function `lookup_table`.
This function expects the indicator qubit to be initialized to (|0\rangle).

**Parameters:**

| Name         | Type            | Description                                              | Default    |
| ------------ | --------------- | -------------------------------------------------------- | ---------- |
| `amplitudes` | `list[float]`   | Real values for the amplitudes. Must be between -1 and 1 | *required* |
| `index`      | `Const[QArray]` | The quantum variable used for amplitude indexing         | *required* |
| `indicator`  | `QBit`          | The quantum indicator qubit                              | *required* |