All Quantum Computing Posts
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Quantum Computing
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 Snake Oil
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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Quantum Computing
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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Quantum Sovereignty
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 Computing
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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Quantum Computing
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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Quantum Computing
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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Quantum Computing
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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