The Ion Shuttle: How Trapped-Ion Computers Move Their Qubits Around
Most quantum processors are stuck with the layout they were built with. A superconducting chip has its qubits soldered into fixed positions, and if tw...
The Million-Qubit Promise: How to Read a Quantum Roadmap
Walk through the marketing material of any serious quantum computing company and you will find a roadmap: a horizontal timeline studded with dates, qu...
The Surface Code: The Checkerboard That Guards a Qubit
Every serious plan for a large quantum computer, from Google's superconducting chips to the neutral-atom machines being built by startups, leans on th...
The Foundry Play: PsiQuantum's Bet on Printing Qubits Like Chips
Almost every quantum computing company shares a habit: they release a machine, add a few more qubits, release another, and invite customers to experim...
The Starling Target: IBM's Roadmap to a Fault-Tolerant Machine
Most companies in quantum computing talk in milestones. IBM talks in machines with names. Its published roadmap reads like a flight plan, each stop a...
The Fridge Makers: The Cryogenic Plumbing That Quantum Computers Run On
The photographs are familiar by now: a golden chandelier of brass plates and coiled tubing, hanging in a lab while engineers in clean-room gear look o...
The Wiring Wall: Why Every New Qubit Needs Its Own Cable
Look at a photograph of a superconducting quantum computer and your eye goes to the golden chandelier, tier after tier of plates and coiled cables des...
The DiVincenzo Checklist: Five Boxes Every Qubit Must Tick
In 2000, the physicist David DiVincenzo wrote down a short list of requirements that any physical system must meet to work as a quantum computer. It w...
The Random Gauntlet: How Scrambled Gates Reveal a Qubit's True Fidelity
Ask a quantum hardware team how good their gates are and you will usually get a number like 99.9 percent fidelity. That figure sounds precise, almost...
The Million-Qubit Problem: Why Quantum Computers Are Going Modular
For years the public story of quantum computing has been about one number climbing upward: the count of qubits packed onto a single chip. But the engi...
The Ion Shuttle: How Quantum Computers Move Atoms to Compute
Most pictures of a quantum computer show qubits fixed in place, wired up like transistors on a circuit board. Trapped-ion machines built on a design c...
The Cosmic Ray Problem: When Space Radiation Wipes a Quantum Chip
Most of the errors that plague a superconducting quantum computer are local and boring in a useful way. One qubit drifts, a control pulse is a hair to...
Lattice Surgery: How Error-Corrected Qubits Actually Talk to Each Other
Building a single logical qubit out of error-correcting code is hard enough. But a useful computation needs those logical qubits to interact, to entan...
The Transpiler: How Your Quantum Program Gets Rewritten Before It Runs
Write a quantum program and you are, in a sense, lying to yourself. You draw a tidy circuit with clean gates connecting any qubit to any other, using...
The CLOPS Count: How Fast a Quantum Computer Actually Runs
Ask what makes a quantum computer good and most people reach for two numbers: how many qubits it has, and how clean those qubits are. Both matter. Nei...
The Tantalum Turn: The Metal That Stretched a Qubit's Life
A superconducting qubit is a tiny electrical circuit that behaves like an artificial atom. Cool it to a fraction of a degree above absolute zero and i...
The Ion Highway: How Quantinuum Shuttles Qubits Across a Chip
In most quantum computers, the qubits sit still. Superconducting circuits are etched into a chip and stay put; entangling two of them means routing si...
The Surface Code: The Checkerboard That Guards a Single Qubit
Ask an engineer at Google, IBM, or almost any lab building superconducting qubits which error-correcting code they plan to run, and you will hear the...
The Hubbard Model: The Electron Puzzle Quantum Computers Want to Solve
Ask a quantum computing researcher for a problem that classical machines genuinely cannot handle, and sooner or later the conversation turns to a comp...
The Advantage Mirage: Has Any Quantum Computer Truly Beaten a Classical One?
Every few years a research team announces that a quantum processor has done something no classical computer can match. The headlines call it quantum s...
The Logical Qubit Race: How Error Correction Is Rewiring Quantum Hardware
For years the headline number in quantum computing was the qubit count. A chip with 50 qubits sounded more impressive than one with 20, and press rele...