Quantum knowledge base

Quantum computing, explained one idea at a time.

Use these guides as a searchable reference while you move through the School of QC roadmap.

Start here

Quantum Computing for Beginners: A Practical Guide

Learn what quantum computing is, how qubits differ from bits, and what to study first without getting buried in physics.

11 min read →
Foundations

What Is a Qubit? A Clear Explanation Without the Hype

Understand qubits, basis states, amplitudes, Bloch-sphere intuition, measurement, and why a qubit is not simply “0 and 1 at once.”

9 min read →
Foundations

Superposition vs Entanglement: What Is the Difference?

A beginner-friendly comparison of two foundational quantum concepts, with circuit intuition and practical examples.

8 min read →
Circuits

Quantum Gates Explained: X, H, Z, CNOT and Beyond

A practical guide to common quantum gates, what they do, and how to think about them when building circuits.

12 min read →
Coding

Qiskit Beginner Roadmap: From First Circuit to Real Hardware

A step-by-step learning path for Python developers who want to start building quantum programs with Qiskit.

10 min read →
Roadmap

Quantum Computing Roadmap: Beginner to Advanced

A complete learning roadmap covering intuition, math, Python, circuits, algorithms, hardware, noise, and specialization paths.

13 min read →
Algorithms

Grover’s Algorithm Explained: Quantum Search Intuition

Understand Grover search, oracles, amplitude amplification, and what the famous quadratic speedup actually means.

9 min read →
Algorithms

Shor’s Algorithm Explained: Factoring, Period Finding and RSA

A conceptual guide to Shor’s algorithm, quantum period finding, and why large fault-tolerant quantum computers matter to cryptography.

11 min read →
Quantum AI

Quantum Machine Learning: What It Is and How to Start

Explore quantum machine learning, variational circuits, quantum kernels, hybrid workflows, realistic expectations, and beginner projects.

12 min read →
Concepts

Quantum vs Classical Computing: What Changes and What Does Not

A grounded comparison of quantum and classical computing, including strengths, limitations, hybrid architectures, and common misconceptions.

10 min read →
Hardware

Quantum Error Correction: Why Logical Qubits Matter

Learn why quantum errors are hard, how error-correcting codes work conceptually, and why fault tolerance is central to scalable quantum computing.

12 min read →
Hardware

Quantum Hardware Types: Superconducting, Ions, Atoms and Photonics

Compare major quantum-computing hardware approaches and the engineering tradeoffs behind different qubit technologies.

12 min read →
For leaders

Quantum Computing Business Use Cases: A Leader’s Guide

A practical framework for evaluating quantum opportunities in optimization, chemistry, finance, security, and machine learning.

11 min read →
Careers

Quantum Computing Careers: Roles, Skills and Portfolio Ideas

Explore quantum software, algorithms, research, hardware, product, security, and strategy roles—and what to learn for each path.

13 min read →
Security

Post-Quantum Cryptography: What Technology Leaders Should Know

Understand the difference between quantum computing and post-quantum cryptography, migration planning, crypto inventory, and long-term data risk.

10 min read →
Cloud

Quantum Cloud Computing: How Developers Access Quantum Hardware

Learn how cloud quantum platforms work, why simulators matter, what jobs and queues mean, and how hybrid workflows are structured.

9 min read →
Projects

15 Quantum Computing Projects to Build Your Portfolio

Project ideas for beginners through advanced learners, including circuits, algorithms, noise, QML, optimization, and quantum readiness.

12 min read →
Math

Math for Quantum Computing: What You Actually Need

A practical math roadmap covering complex numbers, vectors, matrices, probability, tensor products, eigenvalues, and unitary operations.

12 min read →
For leaders

Quantum Computing for Executives: 10 Questions to Ask Now

A decision-maker checklist for quantum strategy, security, talent, vendors, pilots, and investment without requiring a physics background.

9 min read →