Quantum-centric supercomputing simulates 12,635-atom protein

Researchers from Cleveland Clinic, RIKEN, and IBM achieved a quantum computing milestone by simulating a 12,635-atom protein-ligand complex—the largest such simulation to date—using a quantum-centric supercomputing framework. The breakthrough demonstrates rapid progress in quantum chemistry simulations, scaling dramatically within months to tackle biologically relevant systems like protein-ligand interactions. The team leveraged a hybrid quantum-classical approach, combining quantum processors with classical supercomputing to calculate electronic structures of large molecular complexes efficiently. This advancement could accelerate drug discovery and materials science by enabling precise simulations of complex biomolecular systems previously beyond computational reach. Published in May 2026, the work marks a critical step toward practical quantum applications in real-world scientific challenges.