Quantum Computing
PostQuantum.com – Industry news and blog on Quantum Computing, Quantum Security, PQC, Post-Quantum, Quantum Tech
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China’s Quantum OS Play: Origin Pilot and the Battle for the Integration Layer
China's Origin Pilot isn't just another quantum SDK — it's a top-down systems integration layer that challenges the West's bottom-up approach to quantum open architecture.
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Quantum Low-Density Parity-Check (qLDPC) Codes
Quantum Low-Density Parity-Check (qLDPC) codes are an emerging class of quantum error-correcting codes that promise to significantly reduce the overhead required for fault-tolerant quantum computing. Much like their classical LDPC counterparts, qLDPC codes are defined by sparse parity-check constraints: each check (stabilizer) acts on only a small number of qubits,…
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Engineering the Quantum Operating System (OS) Stack: From Nanosecond Pulse Control to System-Level Orchestration
The argument for quantum computing's "PC moment" has become surprisingly compelling. QuantWare ships superconducting QPUs to customers in 22 countries. Qblox sells modular control stacks to over 100 labs. Bluefors has installed 1,800 cryogenic systems worldwide. The Quantum Open Architecture movement and reference designs like the Quantum Utility Block are…
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Quantum Open Architecture (QOA): The “PC Moment” of Quantum Computing
Today, a sea change is underway. Quantum Open Architecture (QOA) is doing for quantum computing what the PC revolution did for classical computing - opening up the ecosystem. Just as the computing world shifted from monolithic mainframes to modular PCs with swappable parts, quantum tech is embracing modularity and specialization.…
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Silicon’s Hidden Advantage: How Biased Noise Could Slash the Cost of Quantum Error Correction
When people say "silicon quantum computing," they often speak as if it is one thing. It is not. It is at least three distinct approaches, built on the same material but employing different physics, different fabrication methods, and different strategies for reaching fault-tolerant scale. Understanding these differences — and the…
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What It Takes to Build a Quantum Computer: Mapping the Hidden Supply Chains Behind Every Modality
A map of the hidden supply chains behind every major quantum computing modality — and a guide to where value, risk, and strategic leverage actually sit. The headlines go to the companies designing quantum processors, but behind every qubit sits an ecosystem of enabling technologies without which the processor is…
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How the EU Can Capture the Benefits of Quantum Computing
The European Union has entered the global quantum race with determination - aiming not just to excel in research, but to translate breakthroughs into economic and strategic benefits. In July 2025, the European Commission unveiled the Quantum Europe Strategy, a roadmap to make Europe a “quantum industrial powerhouse” by 2030.…
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Experimental Quantum Error Correction Below Threshold
When Harvard’s neutral-atom team quietly dropped their new paper on a fault-tolerant architecture for universal quantum computation, a few days ago, it felt like the field had crossed an invisible line. For years we’ve had impressive pieces of the puzzle - better qubits here, a clever code there, some elegant…
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A Quantum Contrarian Con Artist
In the growing spotlight on quantum technology, a new kind of opportunist is taking the stage - the contrarian con artist. These are not the honest skeptics who ask hard questions in good faith. They are bad-faith actors cloaking themselves in “skepticism” to hijack the discourse around quantum computing and…
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Analysis of Quantinuum Helios, a 98‑Qubit Trapped‑Ion Quantum Computer
In November 2025, Quantinuum unveiled Helios, a new 98-qubit quantum processor that pushes the frontier of quantum computing with a novel trapped-ion architecture. It also published an accompanying paper on arXiv "Helios: A 98-qubit trapped-ion quantum computer." Helios is based on the quantum charge-coupled device (QCCD) design, meaning it physically…
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Predicting Quantum Computing Winning 2025 Nobel Physics Prize
Announcements of 2025 Nobel Prize winners start tomorrow. With announcements for Nobel Prize for Physics scheduled for Tuesday 7 October. Every autumn I indulge in a guilty pleasure: browsing speculative lists of Nobel Prize contenders and trying to guess who might pick up the world’s most coveted science prize. Part…
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Quantum MedBeds and Death Threats
I never write about current politics. This might be my first on this blog. In fact, for the sake of my own sanity, I’ve made a point of steering this blog and most of my day clear of politics and the daily chaos of partisan news. I prefer to focus…
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Cisco’s Full-Stack Approach and the Road to Quantum Data Centers
Cisco took on an ambitious full-stack strategy to make distributed quantum computing a reality sooner than many expect. Instead of waiting for a single perfect quantum processor with millions of qubits, Cisco is building the hardware, software, and architecture needed to network today’s smaller quantum machines into unified quantum data…
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Factoring RSA-2048 in 20 Minutes with 42 Qubits
We present a resource estimate for factoring 2048-bit RSA integers using a quantum computer with just 42 physical qubits and a runtime of approximately 20 minutes. Our approach combines well-established results from the recent literature: Regev's O(n3/2) quantum factoring algorithm [1], asymptotically optimal qLDPC codes at their proven constant encoding…
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The Easiest Job in Quantum Computing – Being a Cynic
Don’t mistake the noise of cynicism for the signal of intelligence. If someone validates themselves as a useless cynic - unwilling to provide anything beyond scoffs and derision - don’t waste your energy getting dragged into their performative pessimism. Instead, direct your attention to the genuine skeptics and curious contrarians who…
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