Deep Dive Series

Long-form research across quantum computing and quantum security

Multi-article series with capstone analyses, interactive tools, and companion databases.

Quantum Systems Integration

Open architecture, modular hardware, and building quantum computers from components

How to Build a Quantum Computer How to Build a Quantum Computer

How to Build a Quantum Computer

Integration guides for assembling quantum computers from modular components. Every major modality covered, from empty lab to first qubit signal, with vendor landscapes and procurement guidance.

What It Takes to Build a QC What It Takes to Build a Quantum Computer

What It Takes to Build a QC

From qubit fabrication through cryogenics, control electronics, and error correction. A component-level breakdown of the supply chain and engineering challenges at each layer.

Quantum Systems Integration & QOA Quantum Systems Integration & QOA

Quantum Systems Integration & QOA

The Quantum Open Architecture model and multi-vendor system design. How independent integrators assemble best-of-breed components into working quantum computers.

Quantum Computing Modalities Quantum Computing Modalities

Quantum Computing Modalities

Superconducting, trapped ion, neutral atom, photonic, silicon spin, and beyond. Every major hardware approach compared on performance, scalability, and commercial readiness.

Quantum Security, PQC Migration & Q-Day

Threat assessment, standards, mandates, migration frameworks, and deadlines

Quantum Computing for Cyber Pros Quantum Computing for Cyber Pros

Quantum Computing for Cyber Pros

An 11-part introduction to quantum computing for security professionals, no physics background required. Amplitudes to Shor, Grover, error correction, and reading vendor roadmaps. Free 114-page ebook included.

CRQC Capability Framework CRQC Quantum Capability Framework

CRQC Capability Framework

The nine engineering capabilities required to build a cryptographically relevant quantum computer. The structured, evidence-based method behind my Q-Day estimates.

Predicting Q-Day Predicting Q-Day

Predicting Q-Day

Frameworks, forecasts, and the data behind competing timelines. Includes the interactive CRQC Readiness Benchmark tool for exploring estimates with your own assumptions.

Getting Started With Quantum SecurityGetting Started With Quantum Security & PQC Migration

Getting Started With Quantum Security

A practitioner’s roadmap from first awareness to active PQC migration. Covers threat assessment, NIST standards, the PQC Migration Framework, and how to build a business case.

Quantum Security Reference Quantum Security Reference

Quantum Security Reference

Essential concepts for security leaders encountering quantum threats for the first time. Algorithms, attack models, and terminology explained without the hype.

PQC Governance & Program Leadership PQC Governance: Program Leadership

PQC Governance & Program Leadership

Who leads PQC migration, how boards govern it, how to fund and execute it. A seven-part Deep Dive for CISOs, boards, and transformation leaders.

Global PQC Migration Timelines Global PQC Migration Timelines

Global PQC Migration Timelines

PQC deadlines are now set across 15+ countries. Maps every mandate, tracks where national requirements diverge, and identifies the compliance gaps that catch multinationals off guard.

CNSA 2.0 Deep Dive CNSA 2.0: NSA's Post-Quantum Requirements

CNSA 2.0 Deep Dive

NSA’s post-quantum cryptography requirements decoded. Required algorithms, enforcement timelines, defense contractor compliance, and what CNSA 2.0 means beyond the NSS.

Quantum Threat to Cryptocurrencies Quantum Threat to Cryptocurrencies

Quantum Threat to Cryptocurrencies

Ten-article series covering quantum resource estimates for breaking Bitcoin and Ethereum, protocol-level fixes, governance bottlenecks, and realistic migration roadmaps.

More Deep Dives

Quantum Sovereignty Quantum Sovereignty

Quantum Sovereignty

Strategic independence in the quantum era. Supply chain dependencies, export controls, and why national quantum strategies are reshaping technology geopolitics.

The Quantum Utility Map The Quantum Utility Map

The Quantum Utility Map

What will fault-tolerant quantum computers actually do? Application areas mapped by qubit requirements, timeline to viability, and projected economic impact.

China’s Quantum Ambition China's Quantum Ambition

China’s Quantum Ambition

Could Beijing win the quantum race? China’s national programs, research output, industrial ecosystem, and the strategic implications for the West.

Quantum Computing CompaniesQuantum Computing Companies & Roadmaps

Quantum Computing Companies

60+ quantum hardware companies profiled and compared across modalities, funding, technical milestones, and commercial readiness. Updated quarterly.

Quantum Snake Oil Dictionary Quantum Snake Oil Dictionary

Quantum Snake Oil Dictionary

A field guide to quantum hype, scams, and misused terminology. Spot exaggerated claims, decode marketing language, and separate real progress from noise.

Articles & Analysis

Quantum Computing, Quantum Security, PQC & Quantum Sovereignty

China Just Pushed Device-Independent QKD (DI-QKD) to 100 Kilometres

A team at the University of Science and Technology of China (USTC) published a paper in Science that quietly redrew the map of what device-independent quantum key distribution (DI-QKD) can do. Led by Bo-Wei Lu, Chao-Wei Yang, Run-Qi Wang, Xiao-Hui ...

Quantum Open Architecture (QOA) & Quantum Systems Integration: From Monoliths to Modular Quantum Computing

Today's quantum computers are monoliths — a single vendor designs the chip, builds the control electronics, writes the software, and operates the cloud platform. The customer gets a black box. This is exactly where classical computing was in the 1960s, ...

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 ...

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 ...

Quantum Sovereignty in Practice: When Geopolitics Becomes Architecture

At its core, quantum sovereignty means having full control over the critical layers of quantum technology domestically - the ability to design, manufacture, and operate quantum systems without external dependency. In practice, this implies a country could build a complete ...

The Cryptographic Iceberg Inside a Mobile Banking Transaction

A single mobile banking payment triggers millions of cryptographic function calls across nine parties. Here's what actually happens - from silicon to settlement - and why it matters for quantum readiness. The Cryptographic Iceberg Inside a Mobile Banking Transaction 320 ...

NIS2, DORA, and the EU Post-Quantum Roadmap

If you are a CISO under NIS2 or DORA, you are already expected to run a risk-management system that tracks material, evolving threats - and to implement “state‑of‑the‑art” controls appropriate to the risk. The EU’s PQC roadmap is effectively saying: quantum ...

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 ...

The Complete US Post-Quantum Cryptography (PQC) Regulatory Framework in 2026

Three pillars anchor the US PQC framework: the Quantum Computing Cybersecurity Preparedness Act (federal law that no executive order can undo), NSM-10's 2035 migration target (still in force), and NIST's finalized FIPS standards (published August 2024). The Trump administration's June ...

The Foundry’s Hidden Supply Chain: Who Really Wins If Silicon Spin Quantum Computing Wins

In September 2025, a team from the Australian startup Diraq and Belgium's imec published a result in Nature that no one in the semiconductor industry could ignore. They had fabricated silicon quantum dot spin qubits on imec's industrial 300-millimeter wafer ...

No Single Law, No Single Excuse: How Canada Regulates PQC Without Saying “Quantum”

Canada's visible PQC guidance - three documents published mid-2025 - is just the tip. Beneath it sits a layered enforcement framework spanning financial regulation, critical infrastructure law, privacy obligations, and securities disclosure that collectively creates binding pressure for quantum readiness ...

Rydberg Atom Sensors: The Quantum Technology That Could Rewrite the Rules of Electronic Warfare

In April 2024, a startup nobody outside Beijing's quantum corridor had heard of quietly incorporated in Zhongguancun. Kewei Quantum (spun out of the Beijing Academy of Quantum Information Sciences) completed its first funding round within months of founding and began ...

PostQuantum.com AI Explainer

An AI tool that answers questions using a curated corpus of information from PostQuantum.com, NIST, NSA, and ENISA and other reliable sources. Ask anything related to quantum computing or quantum security.

From the author

Quantum Academy – training and certification for the quantum workforce