QPU137 — Vendor-neutral hardware intelligence

Build for the Quantum Era.

QPU137 teaches quantum computing from zero — the math, the physics and the circuits — in plain English, with experiments you run right in your browser. 9 courses and 101 chapters take you to advanced topics, and our catalog of 35 real quantum processors shows every figure with its source and date. No hype.

Open Quantum Lab Start from zero — free All courses

No physics degree requiredSimulation runs client-sideEvery metric carries its source

Live measurement — Bell pairstandby

shots

press run to acquire

|00⟩|01⟩|10⟩|11⟩

————

counts: sampledamplitudes: statevector, exactengine: in-browser

A 6-gate, 5-qubit ring circuit grows 3× on a sparse lattice → see why

Method — Compilation delta3 archetype targets · reference compiler

Why is my circuit bigger on real hardware?

Because no processor speaks your abstract gates natively, and few connect every qubit to every other. One 5-qubit entangling ring — a GHZ chain closed by a final CX — compiled live against three architecture archetypes. Bars measure two-qubit operations — the error currency on current hardware; amber is routing overhead. Nothing here is judged, only counted.

Catalog — Hardware index35 devices · retrieved 2026-08-19

Quantum hardware, sourced.

Every figure is a dated observation with a public source and a vendor-claim label. Absence of disclosure is recorded as a finding — never left blank, never estimated.

Processor	Technology	Qubits	Evidence	Retrieved
Atom Computing second-generation system (1,225-site array)ATOM COMPUTING · OTHER	Neutral atom	1180	vendor claim	2026-08-19
IBM CondorIBM · HEAVY-HEX	Superconducting	1121	vendor claim	2026-08-19
QuEra Gemini-classQUERA · ALL-TO-ALL	Neutral atom	260	vendor claim	2026-08-19
ibm_boston (Heron r3)IBM · HEAVY-HEX	Superconducting	156	vendor claim	2026-08-19
ibm_brisbane (Eagle r3)IBM · HEAVY-HEX	Superconducting	127	vendor claim	2026-08-19

View all 35 processors Compare processors

Log — Reality assessmentsclassifications, never scores

What can quantum computers actually do?

Theory, demonstration, practical capability, roadmap, and marketing claim — never blended. Each assessment carries a date, a source, a scale, and the hardware it applies to.

Practical today: no · estimates span 20×Can quantum computers break RSA-2048?Theoretically yes since 1994; demonstrated only for small integers. The gap is orders of magnitude.Hardware demonstrated · contested definitionsHas quantum advantage actually been achieved?Depends entirely on which definition you accept — we lay out the demonstrations and the disputes, dated and sourced.All assessmentsBrowse all reality assessments →Bitcoin, drug discovery, optimization, machine learning, and more.

Lab — Learn by measuring12 lessons · graph, not ladder

Lessons built out of the Lab itself.

Every lesson embeds the real editor and the real simulator. Enter the graph anywhere — prerequisites are signposts, not gates.

No prerequisitesWhy a qubit is not a probabilistic bitAmplitudes carry sign. Build the interference a coin flip cannot produce.After: superposition · measurementEntanglement you can measureConstruct all four Bell states and verify the correlations shot by shot.After: two-qubit gatesWhat connectivity costs youRun one circuit on two topologies; the SWAP count decides your fidelity.

All 12 lessons