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

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 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

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

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


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

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 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

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

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

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: 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

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

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

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

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


Quantum 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

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

The Quantum Random Number Generator (QRNG) Gold Rush

Everyone is selling quantum randomness. Most buyers can't tell the difference between genuine quantum entropy and a rebranded noise source with a quantum sticker on the box. This guide fixes that ...

The Quantum Supply Chain: Where Every Component Comes From and What Breaks If It Stops

A handful of countries and companies supply the entire Western quantum hardware stack. Where the concentration risk sits layer by layer, how it materializes in ordinary procurement, and why open architecture is the structural mitigation ...

Post-Quantum Deadlines Are Likely About to Compress. Here’s What I’m Seeing.

Governments spent 2025 publishing PQC roadmaps. In 2026, they started giving those roadmaps teeth. A draft US executive order, the EU's first binding PQC law, and vendor deadlines from Google and AWS are collapsing the compliance horizon from 2035 to ...

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 ...

The CISO’s Role in PQC Migration: Organizational Models, Three Lines of Defence, and the Authority Question

The CISO role varies enormously across organizations. That variation determines whether CISO-led PQC governance works, and this article maps six real-world models to explain when and why ...

The Global PQC Migration Clock: Where Every Country Stands and Why the Gaps Between Them Matter More Than the Deadlines Themselves

Fifteen countries have now set PQC migration timelines. They all agree the migration must happen. They disagree on when, how, and with which algorithms. This capstone maps the convergence, the conflicts, and the compliance reality for organizations operating across borders ...

Quantum Radar Is Dead. The Physics Was Never There.

Fifteen years and over a hundred papers later, the verdict on quantum radar is in. The maximum range is limited to tens of meters by physics, not engineering. My earlier coverage was too generous ...

You Can Now Build a Quantum Computer from Off-the-Shelf Components

In March 2026, a consortium in Denver assembled a working quantum computer from five different vendors' components in five months. A Dutch QPU, Dutch control electronics, an American cryostat, Australian calibration software, supply chain spanning three continents, integration in Colorado ...

“They’ll Just Rent One”: The Quantum Threat Model Nobody Bothered to Check

Every article about quantum threats includes the throwaway line: criminals won't need their own quantum computer, they'll just rent one. The actual evidence says otherwise ...

PQC Governance: Who Should Lead Your Post-Quantum Migration, and How to Structure the Program

PQC migration is the most complex cryptographic transformation in enterprise history. Getting the governance model right determines whether it succeeds or stalls. Here's how to structure it ...

NIST Narrows the Field: Nine Post-Quantum Signature Candidates Advance to the Third Round

NIST just narrowed 14 post-quantum signature candidates to nine. The survivors span four distinct mathematical families, from isogeny-based compact signatures to multivariate schemes under active cryptanalytic fire. Here's what each candidate is, why NIST kept it, and what this means ...

CNSA 2.0: The Complete Guide to NSA’s Post-Quantum Requirements

The definitive vendor-neutral reference to NSA's Commercial National Security Algorithm Suite 2.0 — the most operationally specific post-quantum cryptography mandate in the world. This guide breaks down every component of CNSA 2.0 in one place: the complete algorithm suite with ...

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.