World's largest quantum circuit simulation for quantum chemistry achieved on 1,024 GPUs

A joint team from Osaka University’s QIQB and Fixstars Corporation achieved the world’s largest classical simulation of quantum chemistry circuits, using 1,024 GPUs to model iterative quantum phase estimation (IQPE) algorithms. The breakthrough surpasses the prior 40-qubit simulation limit, enabling larger molecular system modeling critical for validating quantum algorithms ahead of fault-tolerant quantum computers. This advancement accelerates development of quantum algorithms for industrial applications, particularly in drug discovery and advanced materials science. The simulation provides a benchmark for future quantum hardware, bridging classical and quantum computing to refine algorithmic efficiency and scalability. Results support progress toward practical quantum chemistry, offering a roadmap for transitioning from classical simulations to real-world quantum computing solutions.