Quantum Computer JS

An interactive quantum computing simulator library with fully typed TypeScript support.

Note: This is the core library engine powering the Quantum Computer Studio. For the full interactive web application, visit the Studio UI Repository or the Live Site.

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Installation

Install via npm:

npm install quantum-computer-js

Features (v2.1.0)

• Optimized Engine: Circuit transpiler with gate cancellation and rotation folding.
• Realistic Simulation: Advanced Noise Models (Depolarizing, Phase Flip, Amplitude Damping).
• Gate Decomposition: Decompose complex gates (SWAP, Toffoli) into hardware-native sets {CNOT, H, T, S}.
• Advanced Metrics: State analysis tools including Fidelity, Partial Trace, and Von Neumann Entropy.
• QNLP Support: Integrated Quantum Natural Language Processing primitives.
• OpenQASM 2.0: Full support for importing and exporting OpenQASM strings.

Quick Start

The library exposes a complete web-worker powered quantum circuit simulator, gate logic, and math utilities.

import { runSimulation } from 'quantum-computer-js';

// 1. Define your circuit
const myCircuit = { 
  numQubits: 2, 
  gates: [
    { type: 'H', target: 0 }, 
    { type: 'CNOT', target: 1, control: 0 }
  ] 
};

// 2. Run the simulation
async function main() {
  const result = await runSimulation(myCircuit, { optimize: true });
  
  // 3. Output the results
  console.log('Probabilities:', result.probabilities);
}

main();

OpenQASM 2.0 Support

Integrate seamlessly with the academic quantum ecosystem (like IBM Qiskit) by importing and exporting OpenQASM string formats.

import { parseQASM, circuitToQASM } from 'quantum-computer-js';

const qasmString = `
OPENQASM 2.0;
include "qelib1.inc";
qreg q[2];
creg c[2];
h q[0];
cx q[0],q[1];
`;

const circuit = parseQASM(qasmString);
const exportedQasm = circuitToQASM(circuit);

Available Exports

• Simulator: runSimulation(Circuit, SimulatorOptions), clearCache()
• Transpiler: optimizeCircuit(Circuit), decomposeCircuit(Circuit)
• Metrics: QuantumMetrics (Fidelity, Entropy, PartialTrace)
• QNLP: QNLPService (Phrase parsing and sentiment analysis)
• Math/Complex: C, add, sub, mul, scale, conj, norm2
• Bloch Sphere: stateToBloch, toBlochPoint
• OpenQASM: parseQASM, circuitToQASM

Links

• Main Engine: GitHub
• Studio UI: GitHub
• Live Web App: quantum-computer-studio.vercel.app
• License: MIT