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Pennylane devices running on Scaleway's Quantum-as-a-Service

Pennylane is an open-source framework for quantum machine learning, automatic differentiation, and optimization of hybrid quantum-classical computations.

Pennylane-Scaleway is a Python package to run pennylane's QML circuits on Scaleway infrastructure, providing access to:

• Aer state vector and tensor network multi-GPU emulators
• AQT trapped-ions quantum computers
• Coming Soon! - IQM superconducting quantum computers

More info on the Quantum service web page.

Installation

Prerequisites

Get your project-id as well as secret-key credentials from your Scaleway account. You can find them in the Scaleway console.

For more information about the device you want to use, its pricing and capabilities, you can visit this page. Use the backend parameter to select the device you want to use (for instance backend="EMU-IBEX-12PQ-L4" if you want to try AQT emulation using a L4 GPU).

Supported device names

The following device names are supported:

• scaleway.aer - Aer emulation, offers flexibility, noiseless by default but can handle given Aer's noise models, large choice of backends.
• scaleway.aqt - AQT (Alpine Quantum Technologies), noisy trapped-ions based quantum computer.
• scaleway.iqm - Coming soon IQM, superconducting quantum computer.

Install the package

We encourage installing Scaleway provider via pip:

pip install pennylane-scaleway

Getting started

To run your pennylane's circuits on Scaleway's quantum backends, simply change your device's name and add your project_id and secret_key (OR set the environment variables SCW_PROJECT_ID and SCW_SECRET_KEY):

import pennylane as qml # You're not dreaming, no need to import pennylane-scaleway as long as it is installed in your current environment.

device = qml.device("scaleway.aer",
        wires=2,
        project_id=<your-project-id>,   # Or set SCW_PROJECT_ID environment variable
        secret_key=<your-secret-key>,   # Or set SCW_SECRET_KEY environment variable
        backend="EMU-AER-16C-128M"
    )

@qml.set_shots(512)
@qml.qnode(device)
def my_circuit():
    qml.Hadamard(wires=0)
    qml.CNOT(wires=[0, 1])
    return qml.counts()

print(my_circuit())

device.stop() # Don't forget to close the session when you're done!

You can also use the device as a context manager so your session is automatically closed when exiting the context:

import pennylane as qml

with qml.device("scaleway.aqt",
    project_id=<your-project-id>,
    secret_key=<your-secret-key>,
    backend="EMU-IBEX-12PQ-L4",
) as dev:

    @qml.set_shots(512)
    @qml.qnode(dev)
    def circuit():
        qml.Hadamard(wires=0)
        qml.CNOT(wires=[0, 1])
        return qml.counts()

    print(circuit())

Friendly reminder to avoid writing your credentials directly in your code. Use environment variables instead, load from a .env file or any secret management technique of your choice.

Session management

A session is automatically created when you instantiate a device. You can manage it manually by calling device.start() and device.stop(), but it is recommended to use the context manager approach instead. You may also attach to an existing session, handle maximum session duration and idle duration by setting these as keyword arguments when instantiating the device. For example:

import pennylane as qml

with qml.device("scaleway.aer",
    wires=2,
    project_id=<your-project-id>,
    secret_key=<your-secret-key>,
    backend="EMU-AER-16C-128M",
    max_duration="1h",
    max_idle_duration="5m"
) as dev:
...

You can visualize your sessions on the Scaleway Console under the Labs/Quantum section.

Documentation

Documentation is available at Scaleway Docs.

You can find examples under the examples folder of this repository.

Development

This repository is in a very early stage and is still in active development. If you are looking for a way to contribute please read CONTRIBUTING.md.

Reach us

We love feedback. Feel free to reach us on Scaleway Slack community, we are waiting for you on #opensource..

License

License Apache 2.0