How to Read a Logical Qubit Claim
Vendors report logical qubit counts that are not comparable to each other. The mechanism underneath the number, and the five properties that make two…
How to Read a Quantum Benchmark
Vendor benchmark numbers are usually accurate and rarely comparable. A field guide to what quantum volume, algorithmic qubits, XEB and CLOPS measure, and what…
Quantum Machine Learning Explained for Developers
What quantum machine learning is, the four model families you will meet, how classical data gets into a quantum computer, and what has actually…
The DiVincenzo Criteria and What They Screen Out
David DiVincenzo's seven requirements were written to stop a specific over-claim. A quarter-century later they still screen architectures, and they still refuse to rank…
What a Quantum Computer Is Not
Part 1 of a no-hype quantum computer intro for security professionals: the category error, what breaks, what survives, and your real deadline.
Vast State, Narrow Door
Three hundred qubits hold more amplitudes than the universe has atoms; one measurement pays out 300 bits. Holevo, no-cloning, and the myth's end.
The Shape of a Quantum Algorithm
Every quantum algorithm is 4 moves: prepare, imprint, interfere, measure. A one-qubit worked example, and why only structured problems pay out.
Correlations Without a Mechanism
Two qubits agree with certainty across any distance, and no message travels. Entanglement defined honestly, plus the 120-degree test gloves fail.
The Impossible Coin
A device that randomizes once and un-randomizes twice, with no record anywhere. The quantum interference experiment that ends the hidden-value story.
The Classical Bit You Don’t Know Yet
Everything you believe about a bit you haven't looked at, made precise: definite values, probabilities as ignorance, and why mixing never un-mixes.