Quantum Computing
PostQuantum.com – Industry news and blog on Quantum Computing, Quantum Security, PQC, Post-Quantum, Quantum Tech
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Quantum Computers Are “Always Five Years Away.” The Targets Are Not.
A new philosophical paper explains why quantum-computing timelines keep resetting. The PFYT framework names a real pattern, but it confuses an unsettled architecture with an undefined target.
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Fidelity in Quantum Computing: The Nines That Decide Q-Day
The best single-qubit gate now fails once in 6.7 million operations. The best two-qubit gates fail a thousand times more often. That gap, counted in nines, sets the pace of fault tolerance and every serious Q-Day estimate.
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Quantum Washing: The Quantum Industry’s Credibility Tax
Greenwashing had a decade-long head start and its own SEC enforcement playbook before the quantum industry caught up. Quantum washing is following the same arc, faster, because the underlying science is harder for outsiders to evaluate.
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McKinsey’s $600 Billion Quantum Finance Number Doesn’t Add Up. Literally.
McKinsey's Quantum Technology Monitor puts quantum computing's finance value at 400 to 600 billion USD by 2035. The disclosed arithmetic ignores its own assumptions, merges AI with quantum, and is never reconciled with published resource estimates. I checked.
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Every US Quantum Computer Runs on Foreign Parts and Foreign Inventions
The U.S. quantum community keeps saying America built every layer of the quantum stack. I tested that claim against the historical record, layer by layer, from theory through cryogenics. The answer has direct implications for supply chain policy and alliance management.
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Quantum Annealing’s Ideal Form Is the Gate Model in Disguise
A 2004 theorem says the idealized model behind quantum annealing and the gate model are one machine in disguise. Its proof freezes a computation at the bottom of an energy valley, and its fine print keeps annealers away from RSA.
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Helium-3 Alternatives: Every Exit From the Shortage, Assessed
Ten engineering escape routes and one geopolitical wildcard for quantum computing's scarcest input, from breeding tritium on purpose to cooling qubits from inside the chip. I assess what each can deliver, what blocks it, and what would change the answer.
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Nobody Understands Quantum Mechanics. Everybody Uses It.
A board member accused me of selling a technology nobody understands. He was half right. The interpretation of quantum mechanics is unresolved. The mathematics has been tested to twelve decimal places and runs your phone.
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Microsoft’s Majorana Qubit: What the Experts Actually Think
I've never trusted the Majorana story, but I'm no condensed-matter physicist. So after the latest chip and the latest Nature rebuttal, I went looking for where the experts, skeptics and defenders both, actually land.
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Quantum Snake Oil Is Flooding the News Cycle — and the Industry Is Letting It Happen
Three extraordinary quantum claims in two weeks, none peer-reviewed, all tied to commercial events. The quantum industry's credibility problem is accelerating, and the people paying the price are the enterprises trying to make real migration decisions.
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Every Quantum Salary Guide I’ve Seen Is Fake. Here’s How I Proved It.
Recruitment agencies are flooding the market with "benchmarked" quantum salary data. I reverse-engineered the numbers in five different guides. Every single one was built from a formula, not from actual placement data.
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The Quantum Utility Ladder: What Fault-Tolerant Quantum Computers Will Actually Be Used For
Every major fault-tolerant quantum algorithm resource estimate, mapped to the problem it solves and the machine it needs. The ladder is lumpier than the roadmaps suggest, and cryptanalysis does not sit at the top of it.
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The Narrow Advantage: Why Quantum Computing Will Transform Five Industries and Disappoint Twenty
Hundreds of papers and six articles later, the map is narrow. Five industries have resource estimates, identified problems, and plausible hardware timelines. Twenty have marketing. This is the capstone synthesis of the series.
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Quantum Computing by 2033: Which Industries Win, Which Wait, and Why
Pharma, chemicals, batteries and advanced materials get real competitive separation from a 2,000-logical-qubit machine. Finance and logistics hit a quadratic-speedup barrier, and machine learning's new advantage has no costed path. A strategic briefing on where your industry sits.
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Quantum Snake Oil: A Field Guide to Misleading Quantum and PQC Technology Marketing
Thirty-five terms from quantum technology marketing, sorted into Red Flag and Misused tracks and tested against physics, cryptography and standards, with the questions that expose an empty claim before a buyer signs anything.
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