How to read a quantum computing announcement
A practical checklist for qubit counts, logical qubits, roadmaps and superlatives — and how to tell a laboratory demonstration from a product.
Blog: guides and analysis
Long-form guides and evergreen explainers from DesignQuantum™. Every factual claim in a guide is tied to a source.
The blog collects DesignQuantum™’s longer guides: new analysis published here, and the evergreen explainers that unpack the ideas behind our news. Short, sourced news reports live on the News page.
Quantum advantage, quantum supremacy and quantum utility: what the words mean
Where the three phrases come from — Preskill, the 2019 Sycamore experiment, IBM’s response, and the 2023 utility paper — and how to read each claim.
Post-quantum cryptography: the NIST standards and how migration works
How NIST’s first post-quantum standards fit together, why migration must start before Q-Day, and the practical steps organizations face now.
Quantum key distribution vs post-quantum cryptography: what each protects against
How quantum key distribution and post-quantum cryptography differ in goals, assumptions, deployment trade-offs, and the threats each addresses.
Quantum error correction and logical qubits, explained
How quantum error correction turns many noisy physical qubits into more reliable logical qubits, and why code distance, thresholds, and surface codes matter.
Superconducting, trapped-ion, neutral-atom, photonic, spin and more: qubit modalities compared
A practical comparison of leading qubit modalities—superconducting, trapped-ion, neutral-atom, photonic, spin, topological and annealing.
What is a qubit? A clear guide to the building block of quantum computers
A plain-English guide to qubits: what they are, how superposition and measurement work, and why quantum bits differ from classical bits.