Large-Scale Neural Network Quantum States Calculation for Quantum Chemistry on a New Sunway Supercomputer

Quantum many-body system can be solved with neural-network method. Nonetheless, the practical deployment of neural network quantum states (NNQS) in large-scale electronic structure analyses faces challenges, chiefly the high sampling cost and the complexity of local energy computations. To overcome these computational barriers, we present an innovative data-parallel NNQS-Transformer implementation. This implementation introduces a hybrid multi-layer workload balancing strategy that effectively addresses previous load imbalance issues while leveraging Julia’s portability to achieve targeted performance optimizations. Through extensive testing, we validate our approach using comprehensive quantum chemistry calculations on systems containing up to 120 spin orbitals, where previous methods were limited to much smaller scales. The implementation demonstrates exceptional scalability on the Sunway platform, achieving 92% strong scaling and 98% weak scaling efficiencies when utilizing up to 37 million processor cores. These significant performance improvements mark a crucial step toward making NNQS calculations practical for real-world quantum chemistry applications.