<p>➀ Researchers at the University of Illinois Urbana-Champaign developed a modular quantum architecture that connects components like Lego bricks using coaxial cables; </p><p>➁ The system achieved 99% fidelity in SWAP gates, enabling scalable quantum computing with minimal signal loss; </p><p>➂ Modular design offers flexibility for upgrades, fault isolation, and reconfiguration without rebuilding entire processors.</p>