Your guide to quantum computing.
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What Is Quantum? The Technology The Different Quantum Computers Changing the World The Security Story Investing Landscape Learn (curriculum) Companies Applications Glossary Timeline Evaluating Claims Courses Quantum, But Friendly Inside a Quantum Computer Quantum in the Real World Quantum Computing Foundations Quantum Circuits, Algorithms, and Industry Fault-Tolerant Quantum Computing and Technical Strategy My Progress News FAQ Additional Resources Ask Quantum AI Agents ★ Saved
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Technology

Seven reference pages covering the machines and the fields around them, written honestly at every level. Vendor claims are labeled as vendor claims.

Quantum Computers What a quantum computer actually is and how a computation runs, start to finish. Qubits Amplitudes, phase and the Bloch sphere. Why a qubit is not '0 and 1 at the same time'. Hardware The reference comparison of all seven modalities: principles, strengths, challenges, and who builds each. Software & Algorithms Shor, Grover, simulation and variational methods. What each does, why it matters, and a reality check. Quantum Networking Distributing entanglement: QKD, networked sensors, and the repeater problem. Quantum Sensing The nearer-term neighbor: precision measurement that doesn't need a million error-corrected qubits. Quantum Security Shor vs today's encryption, harvest-now-decrypt-later, and the NIST post-quantum standards.

How this hub is organized

Start with Quantum Computers for the machine itself and Qubits for the unit it computes with. Hardware is the reference centerpiece: the honest comparison of all seven ways people build qubits, connected to the company directory. Software & Algorithms covers what the machines would actually run. The last three pages (Networking, Sensing and Security) are the neighboring quantum fields, two of which are commercializing ahead of computing itself.

Quantum, But Friendly

How Small Is Small?The Spinning CoinBit vs QubitSpooky Friends Final test

Inside a Quantum Computer

The Golden ChandelierHow It ThinksGood At, Bad At Final test

Quantum in the Real World

Quantum You Already OwnThe Great Quantum RaceFollowing the Quantum Money Final test

The Academy

Quantum Computing FoundationsQuantum Circuits, Algorithms, and IndustryFault-Tolerant Quantum Computing and Technical Strategy The full curriculum

Quick answers

GlossaryFAQ Additional ResourcesAsk Quantum Quantum News