Quantum Computing System Overview: A Full-Stack Perspective
Quantum computing is often discussed as a revolutionary leap driven by exotic physics and ever-increasing qubit counts . In practice, however, a quantum computer is not a single breakthrough device but a complex, tightly coupled system — one that blends fragile quantum hardware with sophisticated classical control, software stacks, and hybrid execution models . This article provides a systems-level overview of quantum computing , written for a mixed technical audience that includes technology executives, system architects , senior engineers, and advanced learners. It assumes familiarity with classical computing architectures while introducing just enough quantum background to understand how real quantum systems are built, programmed, and operated today. Rather than focusing on abstract algorithms or marketing milestones, the emphasis here is on how quantum computers actually function as end-to-end systems , where performance is often constrained less by physics alone and more ...