A Fault-Tolerant Million Qubit-Scale Distributed Quantum Computer

• DOI: 10.1145/3620665.3640388
• Publication Date: 2024-04-22T14:18:06Z
• Authors: Junpyo Kim; Dongmoon Min; Jungmin Cho; Hyeonseong Jeong; Ilkwon Byun; Junhyuk Choi; Juwon Hong; Jangwoo Kim

A million qubit-scale quantum computer is essential to realize the supremacy. Modern large-scale computers integrate multiple located in dilution refrigerators (DR) overcome each DR's unscaling cooling budget. However, a multi-DR introduces its unique challenges (i.e., slow and erroneous inter-DR entanglement, increased qubit scale), they make baseline error handling mechanism ineffective by increasing number of gate operations communication latency decode correct errors. Without resolving these challenges, it impossible fault-tolerant computer.