2025/05/26 by Weijie Du, Du, Weijie, Yang-Guang Yang +7
Physics and Astronomy · #Quantum and electron transport phenomena #Topological Materials and Phenomena #Cold Atom Physics and Bose-Einstein Condensates
paper · pdf · doi:10.48550/arxiv.2505.19906
To overcome the limitations of existing algorithms for solving self-bound quantum many-body problems -- such as those encountered in nuclear and particle physics -- that access only a restricted subset of energy levels and provide limited structural information, we introduce and demonstrate a novel quantum-classical approach capable of resolving the complete bound-state spectrum. This method also provides the total angular momentum J associated with each eigenstate. Our approach is based on expressing the Hamiltonian in second-quantized form within a novel input model combined with a scan scheme, enabling broad applicability to configuration-interaction calculations across diverse fields. We apply this hybrid method to compute, for the first time, the bound-state spectrum together with corresponding J values of 20O using a realistic strong-interaction Hamiltonian. Our approach applies to hadron spectra and J values solved in the relativistic Basis Light-Front Quantization approach.