Vacuum Rabi splitting in the JC model The atom is excited by the operator Measured transmission spectrum showing the vacuum Rabi mode splitting S S GS 1 |2) 0 VIGS e o 92/4 (e,O)+|g,0))/2 0.1 O))/2 spontaneous emission to Gs state 0.04 o 0.02 data The emission spectrum has two peaks with 6026.036.046.056.066.07 equal height(the distance of the two peaks Frequency, VRF(GHz) 2g is the vacuum Rabi splitting) Walraff et al. nature 431 2g is the energy difference of the lst and 2nd 162(2004 eigenstates( ) ( ) , 0 , 0 ,0 ,0 / 2 ,0 ,0 / 2 V e g g e GS g V GS e e g e g = + = = = + − The atom is excited by the operator spontaneous emission to GS state The emission spectrum has two peaks with equal height (the distance of the two peaks, 2g, is the vacuum Rabi splitting). 2g is the energy difference of the 1st and 2nd eigenstates Vacuum Rabi splitting in the JC model Wallraff et al., Nature 431, 162(2004). Measured transmission spectrum showing the vacuum Rabi mode splitting