We do not try, here, to give references. The reader can find a thorough discussion of the past and the present of the problem of the cosmological constant inW. H. McCrea:Q. J. R. Astron. Soc,12, 140 (1971) andS. Weinberg:Rev. Mod. Phys.,61,1 (1989), the latter with complete references. As to the inflationary models, the recent bookR. Dominguez-Tenreiro andM. Quiròs:An Introduction to Cosmology and Particle Physics (World Scientific, Singapore, 1988), gives a wide exposition with copious references.
V. L. Ginzburg, D. A. Kirzhnitz andA. A. Lyubushin:Sov. Phys. JETP,50, 844 (1971);T. V. Ruzmaikina andA. A. Ruzmaikin:Sov. Phys. JETP,30, 372 (1970).
V. Ts. Gurovich andA. A. Starobinsky:Sov. Phys. JETP,50, 844 (1979).
A. A. Starobinsky:Phys. Lett, B,91, 99 (1980). See also:L. A. Kofman, A. D. Linde andA. A. Starobinsky:Phys. Lett. B,157, 361 (1985) andL. A. Kofman, V. F. Mukhanov andD. Yu. Pogosian:Sov. Phys. JETP,66, 433 (1987).
M. V. Fischetti, J. B. Hartle andB. L. Hu:Phys. Rev. D,20, 1699 (1979). See alsoP. C. W. Davies:Phys. Lett. B,68, 402 (1977).
SeeS. A. Fulling andS. N. M. Ruijsenaars:Phys. Rep.,152, 135 (1987) andS. Takagi:Prog. Theor. Phys. Suppl., No. 88 (1986) for an exhaustive review of the problem. The recent papers byP. C. W. Davies (Class. Q. Grav.,4, L225 (1987);Ann. Inst. Henri Poincare,49, 297 (1988)) are particularly enligthening on the nature of the De Sitter horizon.
G. L. Sewell:Ann. Phys. (N.Y.),141, 201 (1982).
Before Davies’ papers, an interesting attempt to justify the early Einstein hypothesis of an energy surface distribution as the limit of a volume distribution was done byV. K. Mal’tsev andM. A. Markov:Proceedings of the P. N. Lebedev Physics Institute, Vol.96 (English translation by Consultants Bureau, New York, N.Y., 1979).
G. W. Gibbons andS. W. Hawking:Phys. Rev. D,15, 2378 (1977).
See, for example,D. W. Jordan andP. Smith:Nonlinear Ordinary Differential Equations (Oxford University Press, 1988), Chapt. 10.3, p. 272.
L. A. Kofman et al.:Sov. Phys. JETP,66, 433 (1987).