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CHARGING PERFORMANCE OF THE ... PHYSICAL REVIEW RESEARCH 4, 013172 (2022) 0.986 (a) <> <!!> <""> 0.8 0.984 0.982 0.980 <##> <$$> <> <!!> <""> <##> <$$> <%%> -1.0 -0.5 0.0 0.6 0.5 1.0 -1.0 -0.5 0.0 0.5 1.0 Emax is the highest-energy level of a QB and EG is the ground state energy. We now discuss the capacity of a QB with the dimerization parameter. The capacities in the degenerate and the fully nondegen- erate ground state regimes are shown in Fig. 9. We find that both in the degenerate and fully nondegenerate ground state regimes, the capacities Reb and Repb are decreased with the dimerization parameter δ. In addition, the capacity is more 0.975 (a) sensitive in the fully nondegenerate than in the degenerate ground regime. Owing to the numerical calculation restriction, we could only calculate the maximum spin number as N = 6. How- ever, from the capacity of the calculated result of the QB, we find that in the fully nondegenerate ground state regime for the most dimerized institution δ = ±1, the increase of the spin numbers will increase the QB capacity. It means <%%> 0.7 qq FIG. 8. The occupations for each spin with the spin numbers N = 6. (a) and (b) are the spin occupations for the hopping strengths J = 0.3 and J = 2.5, respectively. 0.9 (b) 0.970 Reb N=3 Repb N=3 Reb N=5 Rep N=5 0.975 0.970 0.965 0.960 -1.0 0.965 -1.0 -0.5 0.0 0.5 1.0 Reb N=4 Repb N=4 Reb N=6 Rep N=6 -0.5 0.0 0.5 1.0 0.6 0.5 0.4 0.3 -1.0 -0.5 qq (b) 0.6 0.5 0.4 0.3 1.0 -1.0 -0.5 (d) (c) Reb, Repb Reb, Repb Oi Reb N=3 Repb N=3 Reb N=5 Rep N=5 0.0 0.5 Reb N=4 Repb N=4 Reb N=6 Rep N=6 0.0 0.5 1.0 qq FIG. 9. The QB’s capacity for odd and even chains. (a) and (c) are the capacities of odd and even chains in the degenerate ground state regime. (b) and (d) are the capacities of odd and even chains in the fully nondegenerate ground state regime. The other parameters are (a), (c)J =0.3,and(b),(d)J =2.5. 013172-7PDF Image | Charging performance of the Su-Schrieffer-Heeger quantum battery
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