Our analytically exact solution to the rabi model QHC, Tao Liu, Yu-Yu Zhang, and Ke-Lin Wang, EPL 96, 14003(201 Xiv:1011.3280 The original JC model σ+Oaa+g(a++a)o Parit in(aa+a-/2+1/2) 丌aa JC 0 e H,H]=0 o solve it easily, we introduce Y H=VH V 0 +oaa+g(a +a ) o ∏I=VI,V [H,m=0HJC  z  a a g a a  x ( ) 2 + + +  = + + The original JC model i a a z i a a JC e e z + +  = = −  + +  (  ) ( / 2 1/ 2) Parity [HJC ,JC ] = 0 To solve it easily, we introduce         − = 1 1 1 1 2 1 V H VHJCV  x  a a g a a  z ( ) 2 + + +  = = − + + + i a a JC x V V e +  =  = +   [H,] = 0 Our analytically exact solution to the Rabi model QHC, Tao Liu, Yu-Yu Zhang, and Ke-Lin Wang, EPL 96, 14003 (2011) arXiv: 1011.3280