(8.4) Evaluate (X1), (X2), AX1, and .X2 for the vacuum state |0). Relate these results to the phasor diagram of the vacuum state shown in Fig. 7.4. Reference: X2 AX, = K >X K > AX, = 1/2 Fig. 7.4 Phasor diagram for the vac- uum state. The uncertainties in the two field quadratures are identical, with AX1 = AX2 = 1/2. Note that this figure is essentially the same as Fig. 7.3(a) except that the uncertainty circle is displaced to the origin to account for the zero classical field of the vacuum