> ## 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.

# Classiq

### ClassiqBackendPreferences

Represents backend preferences specific to Classiq quantum computing targets.

This class is used to configure the backend options for executing quantum circuits on Classiq's platform.
The relevant backend names for Classiq targets are specified in `ClassiqSimulatorBackendNames` & `ClassiqNvidiaBackendNames`.

**Methods:**

| Name                                      | Description |
| ----------------------------------------- | ----------- |
| [is\_nvidia\_backend](#is_nvidia_backend) |             |

**Attributes:**

| Name                       | Type                                         | Description                                                                                                                                                                                  |
| -------------------------- | -------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `backend_service_provider` | `ProviderTypeVendor.CLASSIQ`                 | The provider vendor (Classiq).                                                                                                                                                               |
| `backend_name`             | `str`                                        | Name of the requested backend or target.                                                                                                                                                     |
| `use_double_precision`     | `bool`                                       | When True, Nvidia and Braket Nvidia simulators use double precision; when False (default), they use single precision. Only applies to Nvidia backends; ignored for other Classiq simulators. |
| `noise_model`              | `str \| None`                                | Optional named preset simulator noise (see `CLASSIQ_NOISE_MODELS`). Mutually exclusive with `simulator_noise_spec`.                                                                          |
| `simulator_noise_spec`     | `ClassiqSimulatorNoiseSpecification \| None` | Optional user-defined noise (see `ClassiqSimulatorNoiseSpecification` in `classiq.interface.backend.simulator_noise` for field semantics and usage). Mutually exclusive with `noise_model`.  |

### backend\_service\_provider

`backend_service_provider: ProviderTypeVendor.CLASSIQ = pydantic.Field(default=(ProviderVendor.CLASSIQ))`

### use\_double\_precision

`use_double_precision: bool = pydantic.Field(default=False, description='Use double precision on Nvidia and Braket Nvidia simulators. Default is False (single precision). Set to True for double precision.')`

### noise\_model

`noise_model: str | None = pydantic.Field(default=None, description='Named preset noise model for Classiq simulators (see CLASSIQ_NOISE_MODELS). Mutually exclusive with simulator_noise_spec.')`

### simulator\_noise\_spec

`simulator_noise_spec: ClassiqSimulatorNoiseSpecification | None = pydantic.Field(default=None, description='Custom noise specification for Classiq simulators. Mutually exclusive with noise_model.')`

### ClassiqSimulatorBackendNames

The simulator backends available in the Classiq provider.

**Attributes:**

| Name                                                                 | Type | Description |
| -------------------------------------------------------------------- | ---- | ----------- |
| [SIMULATOR](#simulator)                                              |      |             |
| [SIMULATOR\_STATEVECTOR](#simulator_statevector)                     |      |             |
| [SIMULATOR\_DENSITY\_MATRIX](#simulator_density_matrix)              |      |             |
| [SIMULATOR\_MATRIX\_PRODUCT\_STATE](#simulator_matrix_product_state) |      |             |

### SIMULATOR

```python theme={null}
SIMULATOR = 'simulator'
```

### SIMULATOR\_STATEVECTOR

```python theme={null}
SIMULATOR_STATEVECTOR = 'simulator_statevector'
```

### SIMULATOR\_DENSITY\_MATRIX

```python theme={null}
SIMULATOR_DENSITY_MATRIX = 'simulator_density_matrix'
```

### SIMULATOR\_MATRIX\_PRODUCT\_STATE

```python theme={null}
SIMULATOR_MATRIX_PRODUCT_STATE = 'simulator_matrix_product_state'
```

### ClassiqNvidiaBackendNames

Classiq's Nvidia simulator backend names.

**Methods:**

| Name                                                     | Description |
| -------------------------------------------------------- | ----------- |
| [is\_braket\_nvidia\_backend](#is_braket_nvidia_backend) |             |

**Attributes:**

| Name                                                                           | Type | Description |
| ------------------------------------------------------------------------------ | ---- | ----------- |
| [SIMULATOR](#simulator)                                                        |      |             |
| [SIMULATOR\_STATEVECTOR](#simulator_statevector)                               |      |             |
| [BRAKET\_NVIDIA\_SIMULATOR](#braket_nvidia_simulator)                          |      |             |
| [BRAKET\_NVIDIA\_SIMULATOR\_STATEVECTOR](#braket_nvidia_simulator_statevector) |      |             |

### SIMULATOR

```python theme={null}
SIMULATOR = 'nvidia_simulator'
```

### SIMULATOR\_STATEVECTOR

```python theme={null}
SIMULATOR_STATEVECTOR = 'nvidia_simulator_statevector'
```

### BRAKET\_NVIDIA\_SIMULATOR

```python theme={null}
BRAKET_NVIDIA_SIMULATOR = 'braket_nvidia_simulator'
```

### BRAKET\_NVIDIA\_SIMULATOR\_STATEVECTOR

```python theme={null}
BRAKET_NVIDIA_SIMULATOR_STATEVECTOR = 'braket_nvidia_simulator_statevector'
```