".)hl 1 In [ tigh l • t.. — (A9) 2 2 24 J Using Eq. (A8 , the commutator factor in Eq. (A7) is written as t 2P(t S = [1 + 12E() 2 (A10) Ye al p )21 and the field dependence drops out. [I] A. A. Starobinsky. Phys.Len. B91. 99 (1980). [2] A. H. Guth, Phys. Rev. D23. 347 (1981). [3] A. D. Lin