Following a Hybrid Job Through a Quantum-HPC Stack
A QPU next to a supercomputer is a demonstration. A QPU inside the job queue is a resource. Here is what sits between the…
China’s Quantum Talent Machine, and What It Couldn’t Buy
Two decades of state recruitment gave China a world-leading quantum program and left it short where it matters most. The workforce lesson transfers to…
How to Read China’s Quantum Computing Hardware Record
Two laboratories on Earth have published below-threshold quantum error correction, and one of them is in Hefei. A working method for separating demonstrated capability…
The Quantum Software Stack Is a Real-Time Systems Problem
There is no quantum operating system yet. Reading the stack by deadline rather than by layer shows why, and shows where the engineering work…
Four Technologies That Decide Which Modality Scales
Qubit counts get the headlines. Control electronics, cryogenics, error correction hardware, and critical materials decide which architectures actually scale. A four-layer diagnostic.
Evaluating a Quantum Company: The Technology
Qubit count is the easiest number to quote and the least informative. A working guide to the metrics, modalities, and manufacturing questions behind a…
Evaluating a Quantum Company: The Claims
A quantum performance claim is scoreable when five things are present: the unit, the population, the conditions, the baseline, and the witness. Here is…
The Three Budgets Behind Every Quantum Control System
Quantum control systems are usually described by their parts. Engineers get further by describing them by their budgets: timing, noise, and wiring.
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…
NISQ, FTQC, FASQ: How to Read the Three Eras of Quantum Computing
One vendor announces 1,121 qubits. Another announces 48 logical qubits on 280 atoms. Three acronyms explain why those numbers cannot be compared, and what…