Odd–even harmonic emission from asymmetric molecules: Identifying the mechanism
Chen Jianguo, Yu Shujuan, Li Yanpeng, Wang Shang, Chen Yanjun †
       

(color online) R-dependent 1σ-state (a) and 2σ-state (b) energy of model HeH2+ with Z1 = 2 and Z2 = 1 obtained by two different methods: the variational method with Eqs. (13) and (14) (black-triangle) and the exact numerical simulation (red-circle).