Is it Q‑Day?

Monitoring Quantum’s Progress
587 days to Q‑Day Q‑Day Briefing →
A pop-art comic panel of cryptographer Matthew Green in halftone dots, saying “We might lose public key cryptography!”, beside a yellow Enigma cipher machine on a blue dotted ground.

Is It AI-Day?

AI cryptographic capabilities are improving and AI-augmented quantum computing developments are accelerating

Oct 21, 2026

Is It Q-Day? A Music Video

A three-and-a-half-minute music video describing what is at risk. Watch it here.

Oct 10, 2026

 An Ed Ruscha–style photo collage of people working at laptops in a sunlit coworking space in Dallas, with the word BUILDERS in yellow letters across the room, partly behind the two men standing.

How Do We Get From Qubits to Quantum-Native Businesses

A high-level overview of the quantum computing industry's market development, from NISQ and FTQC to quantum-native businesses.

Sep 29, 2026

Evolution of Quantum Hardware

Six modalities, from Feynman to fault tolerance.
A tilted Bauhaus-style grid of photo tiles showing engineers installing an IBM quantum computer, with red squares, a 19th-century balance scale, and the words COST OF SOLUTION, $20M–$10B and TRAPPED ION TO SUPERCONDUCTING.

Cost Estimates to Crack Cryptography With a Quantum Computer

Cost of solution estimates for various quantum computing hardware scenarios used to crack RSA-2048, secp256k1, and P-256.

Sep 16, 2026

 A photo collage of a woman checking her handbag in the doorway of a 1967 bank vault while, behind her, in colour among the safe-deposit boxes, stands an IonQ quantum computer.

IonQ Publishes Architecture to Break secp256k1 With Shor’s Algorithm

IonQ has published an approach and timeline for cracking secp256k1, a cryptographic curve used to authorizing cryptocurrency transactions

Sep 9, 2026

 A surreal collage of Edward Weston’s 1927 nautilus shell, repeated in a receding line of shells across a desert scrubland toward the mountains, each one smaller than the last.

Quantum Performance Is Improving Faster Than You Think

Exponential gains in performance sound absurd until you look at what lightbulbs, penicillin, genome sequencing, and computers actually delivered.

Aug 19, 2026

 A Bauhaus-style collage of a scientist in a white lab coat studying glass laboratory apparatus in a sepia archive photo, beside an ancient golden laurel wreath on a blue disc, an orange circle and a black diagonal bar, with the words Q-PRIZE, MEDICINE · ENERGY · MATERIALS and BREAKTHROUGHS.

Quantum Computing Needs to Focus on Benefits

The quantum computing industry should promote the benefits of the tech and not only the destructive aspects of Q-Day

Aug 13, 2026

 A Bauhaus-style collage: an open student notebook of weaving diagrams and swatches, framed by nested yellow squares, above the words A BREAK.

Vacation Reading

Going on vacation. Here are some book recommendations.

Jul 29, 2026

 A surreal collage of a gold dilution refrigerator, the inside of a quantum computer, standing in the surf off Kings Beach, South Africa, as a wave rolls in behind it.

Three Phases of the Quantum Computing Market

The quantum computing market will evolve over three phases.

Jul 21, 2026
All notes
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3 months
Quantum Technology Index

Thirteen quantum stocks, updated every trading day.
21vendors

IonQ · Quantinuum · Quantum Art · IBM · D-Wave · Rigetti · IQM · OQC · Alice & Bob · Fujitsu · Nord Quantique · Pasqal · Infleqtion · QuEra · Atom Computing · Oratomic · planqc · Xanadu · Quandela · Diraq · Quobly

Five modalities2026–2030
Vendor Roadmaps

Every published qubit milestone to 2030, sourced.
Is it
Q‑Day?
587 days remain
The Q‑Day Briefing

What breaks, when, and who is ready.