laravel-qiskit

Quantum computing for Laravel — submit circuits, poll results, and handle IBM Quantum jobs just like you'd handle anything else in your app.

Overview

laravel-qiskit is a first-class Laravel package for IBM Quantum / Qiskit Runtime. It brings quantum job submission into the Laravel ecosystem you already know — Eloquent models, queued jobs, events, Artisan commands, and a fluent facade — so you can focus on your circuits instead of the API plumbing.

Features

• Fluent circuit builder — chainable gate API with OPENQASM 3.0 serialization
• Sampler & Estimator primitives — mirrors the Qiskit Runtime primitive interface
• Async job dispatch — jobs go through Laravel's queue; polling happens automatically via a background job chain
• Event-driven results — listen for QuantumJobCompleted and get counts or expectation values
• Session management — open, close, or run() a session with auto-close
• Backend discovery — filter backends by qubit count, queue depth, and availability
• Eloquent model — QuantumJob with scopes, status constants, and a PrimitiveResult accessor
• Artisan commands — qiskit:install, qiskit:jobs, qiskit:status, qiskit:cancel, qiskit:backends

Requirements

• PHP 8.2+
• Laravel 10, 11, 12, or 13
• An IBM Quantum account (API key + Service CRN)

Installation

composer require justinwoodring/laravel-qiskit

Publish the config and run migrations:

php artisan qiskit:install

Add your credentials to .env:

QISKIT_API_KEY=your-ibm-quantum-api-key
QISKIT_SERVICE_CRN=crn:v1:bluemix:public:quantum-computing:us-east:...
QISKIT_DEFAULT_BACKEND=ibm_brisbane

Quick Start

Build a circuit

use JustinWoodring\LaravelQiskit\Circuit\Circuit;

// Bell state — maximally entangled 2-qubit state
$circuit = Circuit::new(2, 2)
    ->h(0)
    ->cx(0, 1)
    ->measure();

echo $circuit->toQasm();

OPENQASM 3.0;
include "stdgates.inc";

qubit[2] q;
bit[2] c;

h q[0];
cx q[0], q[1];
c[0] = measure q[0];
c[1] = measure q[1];

Submit a Sampler job (async)

use JustinWoodring\LaravelQiskit\Facades\Qiskit;

$job = Qiskit::sampler('ibm_brisbane')
    ->addPub($circuit, shots: 4096)
    ->dispatch()   // → PendingJob
    ->dispatch();  // → QuantumJob (Eloquent model, enqueues to queue)

// $job->id, $job->status, $job->backend ...

Start your queue worker to process the submission and polling:

php artisan queue:work

Listen for results

// app/Providers/EventServiceProvider.php
use JustinWoodring\LaravelQiskit\Events\QuantumJobCompleted;

protected $listen = [
    QuantumJobCompleted::class => [
        App\Listeners\HandleQuantumResults::class,
    ],
];

// app/Listeners/HandleQuantumResults.php
public function handle(QuantumJobCompleted $event): void
{
    $counts = $event->result->getCounts();
    // ['00' => 2048, '11' => 2048]
}

Estimator with observables

use JustinWoodring\LaravelQiskit\Circuit\Circuit;
use JustinWoodring\LaravelQiskit\Facades\Qiskit;

$ansatz = Circuit::new(2)
    ->withParameters(['theta'])
    ->ry('theta', 0)
    ->cx(0, 1);

$job = Qiskit::estimator()
    ->addPub($ansatz->bind(['theta' => M_PI / 3]), observables: ['ZZ', 'XI'])
    ->dispatch()
    ->dispatch();

Sessions

Reserve a backend across multiple jobs to avoid re-queuing between iterations:

Qiskit::sessions()->run('ibm_brisbane', function (string $sessionId) {
    Qiskit::sampler()->addPub($circuit1)->inSession($sessionId)->dispatch()->dispatch();
    Qiskit::sampler()->addPub($circuit2)->inSession($sessionId)->dispatch()->dispatch();
    // Session closes automatically when the callback returns
});

Backend discovery

// All online real hardware with at least 100 qubits
$backends = Qiskit::backends()
    ->filter()
    ->online()
    ->simulator(false)
    ->withMinQubits(100)
    ->withMaxQueueDepth(30)
    ->get();

Artisan Commands

# Publish config + run migrations
php artisan qiskit:install

# List jobs
php artisan qiskit:jobs
php artisan qiskit:jobs --status=completed --limit=50

# Check job status
php artisan qiskit:status 42
php artisan qiskit:status cj1abc123def --ibm-id

# Cancel a job
php artisan qiskit:cancel 42

# List backends
php artisan qiskit:backends
php artisan qiskit:backends --online

Configuration

After running qiskit:install, edit config/qiskit.php:

return [
    'api_key'         => env('QISKIT_API_KEY'),
    'service_crn'     => env('QISKIT_SERVICE_CRN'),
    'base_url'        => env('QISKIT_BASE_URL', 'https://us-east.quantum-computing.cloud.ibm.com'),
    'default_backend' => env('QISKIT_DEFAULT_BACKEND', 'ibm_brisbane'),

    'polling' => [
        'interval'     => env('QISKIT_POLL_INTERVAL', 10),      // seconds
        'max_attempts' => env('QISKIT_POLL_MAX_ATTEMPTS', 360),  // ~1 hour
        'queue'        => env('QISKIT_POLL_QUEUE', null),
    ],

    'http' => [
        'timeout' => env('QISKIT_HTTP_TIMEOUT', 30),
        'retry'   => ['times' => 3, 'sleep' => 1000],
    ],
];

Events

Circuit Gates

Parameterized circuits:

$circuit = Circuit::new(1)
    ->withParameters(['theta'])
    ->ry('theta', 0)
    ->bind(['theta' => 1.5707]);

Testing

composer install
./vendor/bin/phpunit

Tests use Orchestra Testbench with an in-memory SQLite database and faked HTTP responses — no real IBM Quantum credentials needed.

Demo

A full demo Laravel app lives in demo/. See demo/README.md for setup instructions.

License

MIT — see LICENSE.