Quantum.js Framework

This repository contains a quantum computing framework implemented in TypeScript. The library provides a Circuit class that allows users to create and manipulate quantum circuits using quantum gates. The library also includes static methods to generate random numbers and strings using quantum principles. Also, it includes a method to optimize the QAOA algorithm using the COBYLA optimization algorithm for the Max-Cut problem.

Documentation link

Installation

To use the Quantum.js library in your project, you can install it via npm:

npm i @earlold/quantum.js

Basic Example Usage

import { Circuit } from '@earlold/quantum.js'; // Import the Circuit class from the library

// Create a quantum circuit with 3 qubits
const circuit = new Circuit(3);

// Apply a Hadamard gate to the first qubit
circuit.h(0);

// Apply a CNOT gate with the first qubit as control and the second qubit as target
circuit.cx(0, 1);

// Run the circuit
circuit.run();

// Measure the qubits
const result = circuit.measure();

console.log(result);

Supported Gates

The library supports the following quantum gates, check the table below for the corresponding methods:

Gate	Method
Identity (I)	i(qubitIndex: number)
Hadamard (H)	h(qubitIndex: number)
Pauli-X (X)	x(qubitIndex: number)
Pauli-Y (Y)	y(qubitIndex: number)
Pauli-Z (Z)	z(qubitIndex: number)
T-gate	t(qubitIndex: number)
Controlled-X (CNOT)	cx(controlIndex: number, targetIndex: number)
Controlled-Z	cz(controlIndex: number, targetIndex: number)

Quantum Functions

Functions	Description
Circuit.genRandomNumber	Generate a random number using quantum principles
Circuit.genRandomString	Generate a random string using quantum principles
Circuit.genRandomNumberWithRange	Generate a random number within a specified range using quantum principles
Circuit.teleportationOneToTree	Teleportation of a qubit from one quantum register to another
optimizeQAOAWithCOBYLA	Optimize the QAOA algorithm using the COBYLA optimization algorithm for Max-Cut problem

Bell State Functions

Functions	Description
Circuit.prepareBellPhiPlus	Prepare the Bell state Phi+
Circuit.prepareBellPhiMinus	Prepare the Bell state Phi-
Circuit.prepareBellPsiPlus	Prepare the Bell state Psi+
Circuit.prepareBellPsiMinus	Prepare the Bell state Psi-

Dependencies

The library uses the following dependencies:

• mathjs - For mathematical operations
• quantum-circuit - For quantum circuit simulation

For more information, check the documentation.