Two paths to scalable quantum computing: Optical links between fridges and higher-temperature qubits

Professor Hong Tang’s lab has advanced superconducting qubit technology with two new studies, addressing a major bottleneck: the need for near-absolute-zero temperatures to maintain quantum coherence. The research proposes optical links between cryogenic quantum processors, enabling scalable connections without heat interference, a critical step toward practical quantum computing architectures. A second approach explores higher-temperature qubits, potentially reducing reliance on extreme cooling and lowering operational costs while maintaining quantum stability. These breakthroughs could bridge the gap between lab-based quantum experiments and real-world applications, accelerating commercialization of fault-tolerant quantum systems. The studies, published in April 2026, highlight dual pathways—optical networking and thermal resilience—to overcome scalability challenges in superconducting quantum hardware.