Quantum computing for the Lipkin model with unitary coupled cluster and structure learning ansatz  

作　　者：Asahi Chikaoka Haozhao Liang 近岡旭;梁豪兆(Department of Physics,Graduate School of Science,The University of Tokyo,Tokyo 113-0033,Japan;RIKEN Nishina Center,Wako 351-0198,Japan)

机构地区：[1]Department of Physics,Graduate School of Science,The University of Tokyo,Tokyo 113-0033,Japan [2]RIKEN Nishina Center,Wako 351-0198,Japan

出　　处：《Chinese Physics C》2022年第2期131-139,共9页中国物理C（英文版）

基　　金：the financial support of Advanced Leading Graduate Course for Photon Science;the JSPS Grant-in-Aid for Early-Career Scientists (18K13549);the JSPS Grant-in-Aid for Scientific Research (S)(20H05648)

摘　　要：We report a benchmark calculation for the Lipkin model in nuclear physics with a variational quantum eigensolver in quantum computing.Special attention is paid to the unitary coupled cluster(UCC)ansatz and structure learning(SL)ansatz for the trial wave function.Calculations with both the UCC and SL ansatz can reproduce the ground-state energy well;however,it is found that the calculation with the SL ansatz performs better than thatwith the UCC ansatz,and the SL ansatz has even fewer quantum gates than the UCC ansatz.

关 键 词：Lipkin model quantum computing variational quantum eigensolver 

分 类 号：O413[理学—理论物理] TP38[理学—物理]