ruqu-wasm

Run quantum simulations in the browser — WebAssembly bindings for ruqu-core and ruqu-algorithms with 25-qubit support.

Features

• Browser-Native — Run quantum circuits directly in JavaScript/TypeScript
• 5 Simulation Backends — StateVector, Stabilizer, Clifford+T, TensorNetwork, Hardware
• 25-Qubit Limit — Optimized for browser memory constraints (~1GB for 25 qubits)
• Full Algorithm Suite — VQE, Grover, QAOA, Surface Code available
• OpenQASM 3.0 — Export circuits to standard quantum assembly format
• Zero Dependencies — Pure WASM, no server required
• TypeScript Types — Full type definitions included

Installation

npm

npm install @ruvector/ruqu-wasm

Rust (for building)

cargo add ruqu-wasm
wasm-pack build --target web

Quick Start (JavaScript)

import init, { Circuit, Simulator } from '@ruvector/ruqu-wasm';

await init();

// Create a Bell state
const circuit = new Circuit(2);
circuit.h(0);        // Hadamard on qubit 0
circuit.cnot(0, 1);  // CNOT: entangle qubits

// Run simulation
const sim = new Simulator();
const state = sim.run(circuit);

// Measure
const result = state.measureAll();
console.log(`Measured: ${result.toString(2).padStart(2, '0')}`);
// Output: "00" or "11" with 50% probability each

React Example

import { useEffect, useState } from 'react';
import init, { Circuit, Simulator } from '@ruvector/ruqu-wasm';

function QuantumDemo() {
  const [result, setResult] = useState<string | null>(null);

  useEffect(() => {
    async function runQuantum() {
      await init();

      const circuit = new Circuit(3);
      circuit.h(0);
      circuit.cnot(0, 1);
      circuit.cnot(1, 2);  // GHZ state

      const sim = new Simulator();
      const state = sim.run(circuit);
      setResult(state.measureAll().toString(2).padStart(3, '0'));
    }
    runQuantum();
  }, []);

  return <div>Quantum result: {result ?? 'Computing...'}</div>;
}

API Reference

Circuit

class Circuit {
  constructor(nQubits: number);

  // Single-qubit gates
  h(qubit: number): void;      // Hadamard
  x(qubit: number): void;      // Pauli-X (NOT)
  y(qubit: number): void;      // Pauli-Y
  z(qubit: number): void;      // Pauli-Z
  rx(qubit: number, theta: number): void;  // X-rotation
  ry(qubit: number, theta: number): void;  // Y-rotation
  rz(qubit: number, theta: number): void;  // Z-rotation

  // Two-qubit gates
  cnot(control: number, target: number): void;
  cz(control: number, target: number): void;
  swap(q1: number, q2: number): void;

  // Three-qubit gates
  toffoli(c1: number, c2: number, target: number): void;
}

Simulator

class Simulator {
  constructor();
  run(circuit: Circuit): QuantumState;
}

QuantumState

class QuantumState {
  measureAll(): number;
  measure(qubit: number): number;
  probability(bitstring: number): number;
  amplitudes(): Float64Array;  // Complex interleaved [re, im, re, im, ...]
}

Algorithms

Grover's Search

import { Grover } from '@ruvector/ruqu-wasm';

const grover = new Grover(4);  // 4 qubits = search space of 16
grover.setTarget(0b1010);       // Search for |1010⟩

const result = grover.search();
console.log(`Found: ${result.toString(2).padStart(4, '0')}`);

VQE

import { VQE, Hamiltonian } from '@ruvector/ruqu-wasm';

const h = new Hamiltonian();
h.addTerm("ZZ", 0.5);
h.addTerm("XX", 0.3);

const vqe = new VQE(h, nQubits: 4);
const energy = vqe.optimize({ maxIter: 100 });
console.log(`Ground state energy: ${energy}`);

Performance

| Qubits | Memory | Init Time | Gate Time | |--------|--------|-----------|-----------| | 10 | 16 KB | 1ms | 0.01ms | | 15 | 512 KB | 5ms | 0.1ms | | 20 | 16 MB | 50ms | 5ms | | 25 | 512 MB | 500ms | 150ms |

Note: 25 qubits requires ~1GB browser memory. Use Web Workers for heavy simulations.

Web Worker Example

// worker.js
import init, { Circuit, Simulator } from '@ruvector/ruqu-wasm';

self.onmessage = async (e) => {
  await init();
  const { gates, nQubits } = e.data;

  const circuit = new Circuit(nQubits);
  gates.forEach(g => circuit[g.name](...g.args));

  const sim = new Simulator();
  const state = sim.run(circuit);

  self.postMessage({ result: state.measureAll() });
};

Bundle Size

| Build | Size (gzip) | |-------|-------------| | Core only | 45 KB | | With algorithms | 120 KB | | Full bundle | 180 KB |

Browser Support

• Chrome 89+
• Firefox 89+
• Safari 15+
• Edge 89+

Requires WebAssembly SIMD for optimal performance (available in all modern browsers).

Related Packages

• ruqu-core — Rust quantum simulator
• ruqu-algorithms — Algorithm implementations
• ruqu-exotic — Experimental hybrids

Documentation

• WASM Strategy (ADR-QE-003)
• Performance (ADR-QE-004)

License

MIT OR Apache-2.0