Work

Systematic many-fermion Hamiltonian input scheme and spectral calculations on quantum computers

Year: 2025

Type: article

Abstract: We present a novel input scheme for general second-quantized Hamiltonians of relativistic or non-relativistic many-fermion systems. This input scheme incorporates the fermionic anticommutation relations, particle number variations, and respects the symmetries of the Hamiltonian. Based on our input scheme, we propose a hybrid quantum-classical framework for spectral calculations on future quantum hardwares. We provide explicit circuit designs and the associated gate cost. We demonstrate our hybrid framework by solving the low-lying spectra of 42 Ca and 46 Ca. Our input scheme provides new pathways to solving the spectra and dynamics of the relativistic and nonrelativistic many-fermion systems via first-principles approaches.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2025.139548

Authors: Weijie Du, James P. Vary

Institutions: Iowa State University, Chinese Academy of Sciences, Institute of Modern Physics

Language: English

Topic: Quantum Computing Algorithms and Architecture

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: diamond

Funders: U.S. Department of Energy, Nuclear Physics

Award: G8177483910