---
title: Quandela QPUs Information
description: Learn more about Quandela QPUs available at Scaleway.
tags: quandela qpu
dates:
  validation: 2025-11-21
  posted: 2021-11-21
---

Developed by **Quandela**, a French quantum computing leader founded in 2017. Their technology is based on Linear Optical Quantum Computing (LOQC), utilizing proprietary single-photon sources and reconfigurable optical circuits to process information at room temperature.

## Key features

* **Room temperature operation:** Unlike many quantum technologies that require cryogenic temperatures, Quandela's photonic QPUs operate at room temperature, simplifying infrastructure needs.
* **All-to-All connectivity:** The photonic qumodes are interconnected through linear optical components, allowing for flexible circuit designs and
* **Linear optical computing:** Utilizes single photons to process information through reconfigurable optical circuits, operating largely at room temperature (chip-level).
* **High-Quality Sources:** Powered by proprietary high-performance single-photon sources, ensuring indistinguishable photons for high-quality interference.
* **Native probabilistic computing:** The hardware natively implements sampling tasks, making it inherently suited for probabilistic modeling.

## Use cases

* **Quantum Machine Learning (QML):** Ideal for generative modeling, classification, and training quantum neural networks (QNNs).
* **Certified randomness:** Generation of high-quality entropy for cryptography and stochastic simulations.
* **Sampling tasks:** Efficiently performs sampling from complex probability distributions, useful in various scientific applications.

## Quandela QPUs available at Scaleway

Scaleway provides access to Quandela's "Mosaiq" generation devices and their digital twins.

| Platform name | QPU Model | Qubits & Topology | Fidelity Metrics (Avg)* | Speed Metrics | Pricing Model |
| :--- | :--- | :--- | :--- | :--- | :--- |
| **QPU-ASCELLA-6PQ** | Mosaiq-6 | 6 photons, 12 modes, All-to-All | 1-gate: 99.6%, 2-gates: 99%, readout: 99% | 4Mhz 144 op/s | 0.3€/circuit + 0.000001€/shot or 750€/hour |
| **QPU-ALTAIR-10PQ** | Mosaiq-10 | 10 photons, 20 modes,  All-to-All | 1-gate: 99.94%, 2-gates: 98.2%, readout: 99% | 3Mhz 400 op/s | 0.3€/circuit + 0.000001€/shot |
| **QPU-BELENOS-12PQ** | Mosaiq-12 | 12 photons, 24 modes, Dual-Rail-Encoding,  All-to-All | 1-gate: 99.6%, 2-gates: 99%, readout: 99% | 3Mhz 576 op/s | 0.3€/circuit + 0.000001€/shot or 1000€/hour |

Developed by Quandela, exQalibur is a cutting-edge photonic quantum emulator accelerated by Scaleway's most powerful GPUs. This synergy enables large-scale simulations, allowing users to explore complex parameter spaces across 31 photonic qubits at kilohertz rates, accelerating prototyping and optimization of advanced quantum algorithms.

| Platform name | Hardware & emulator | Qubits & topology	| Fidelity metrics	| Pricing model |
| :--- | :--- | :--- | :--- | :--- |
| **EMU-SAMPLING-L4** | L4 GPU, exQalibur | 26 photons, hundred modes,  All-to-All | Logical qubits | 1.125€/hour |
| **EMU-SAMPLING-2L4** | 2x L4 GPU, exQalibur | 27 photons, hundred modes,  All-to-All | Logical qubits | 2.25€/hour |
| **EMU-SAMPLING-4L4** | 4x L4 GPU, exQalibur | 28 photons, hundred modes,  All-to-All | Logical qubits | 	5.5€/hour |
| **EMU-SAMPLING-4H100SXM** | 4xH100 SXM GPU, exQalibur | 30 photons, hundred modes,  All-to-All | Logical qubits | 17.415€/hour |
| **EMU-SAMPLING-8H100SXM** | 8xH100 SXM GPU, exQalibur | 31 photons, hundred modes,  All-to-All | Logical qubits | 34.542€/hour |

## Perceval: The native SDK for photonic

**Perceval** is the open-source software framework created by Quandela for linear optical quantum computing. It provides a simple and powerful object-oriented API to:

- **Design** - linear optical circuits (Beam Splitters, Phase Shifters, etc.).
- **Simulate** - photon behavior (ideal or noisy simulation).
- **Execute** - algorithms on various backends: local simulators, high-performance remote simulators (on GPU), or real photonic QPUs.

On Scaleway QaaS, the integration is natively integrated into `perceval-quandela` package, which acts as a remote backend for your sequences.

<Message type="tip">
  Refer to the [How to program Quandela processors](/quantum-computing/how-to/use-quandela-qpus/) to learn how to use them at Scaleway.
</Message>