Deep Dives are PostQuantum.com’s long-form research series. Each one explores a major quantum technology or security topic across multiple articles — with a capstone that ties the narrative together, individual articles that go deep on each dimension, and (where relevant) interactive tools and companion databases. Within each series, articles are designed to be read in sequence or used as standalone reference when you need them. The nine series below are independent of each other — start with whichever topic matters most to you.
An honest assessment of China’s national quantum program — cutting through both the hype that inflates its capabilities and the denialism that dismisses them. Policy, investment, talent, infrastructure, and the question the West keeps getting wrong.
Who can build, operate, trust, and control quantum capabilities under geopolitical stress — without being cut off? Export controls, supply chains, alliances, capital, talent, espionage, and the operational playbook for turning sovereignty from ambition into architecture.
A practitioner’s roadmap for launching and running a quantum-readiness program — from boardroom mandate and budget justification through cryptographic discovery, CBOM construction, risk scoring, hybrid pilots, infrastructure hardening, and vendor governance.
When will a quantum computer break today’s cryptography? Frameworks, forecasts, and the CRQC Readiness Benchmark — plus the interactive Q-Day Estimator tool, and the argument that regulators have already set the real deadline.
The nine capabilities a quantum computer must master to break cryptography — mapped, measured, and scored across modalities. From error correction and magic state production to continuous multi-day operation, plus the total cost and energy analyses.
A field guide to every way humanity is trying to build a quantum computer — superconducting, trapped-ion, photonic, neutral-atom, silicon spin, topological, and the exotic frontier. The physics, the trade-offs, the companies, and the honest path to scale.
The hidden supply chains behind every major quantum computing modality. Dilution refrigerators, precision lasers, photonic foundries, isotopically purified silicon — who supplies them, where the bottlenecks are, and who wins if each modality wins.
How quantum computing moves from monolithic black boxes to modular, open, composable systems — from control electronics and operating systems through heterogeneous architectures to cloud delivery and QaaS.
Detailed profiles of every major quantum hardware company — their modality, roadmap, funding, competitive position, and CRQC relevance — plus a searchable database to compare them all. The capstone analysis reveals the patterns that emerge when you read 60+ roadmaps together.
