Quantum technologies inspire bold visions for future defence—unbreakable communications, ultra-precise sensing, and computing power beyond classical limits. Yet the gap between laboratory promise and operational utility is vast. Quantum Realism is the discipline of acknowledging both potential and limitation, applying structured progression through Technology Readiness Levels (TRLs) while focusing on algorithms that deliver measurable advantage.
Too often, quantum initiatives stall because prototypes remain at low TRLs or because algorithms lack mission relevance. Defence strategy demands a pragmatic path: validate algorithms in simulation, benchmark them against real-world conditions, and advance hardware only when operational thresholds are met. This approach reduces hype and ensures investment aligns with capability.
Strategic discipline also requires cross-domain integration. Quantum sensing must connect with ISR networks, cryptographic advances must link with command-and-control, and quantum-inspired algorithms must enhance autonomy. By embedding rigour at every stage—concept, validation, and deployment—militaries can accelerate genuine breakthroughs while avoiding premature overpromising.
Quantum Realism is thus less about chasing the “quantum revolution” and more about disciplined readiness: advancing step by step, algorithm by algorithm, until disruptive capability emerges. In defence, realism—not hype—will secure the quantum edge.
