Phys. Rev. D 54, 7252–7260 (1996)One-loop superstring cosmology and the nonsingular universeReceived 28 May 1996; published in the issue dated 15 December 1996 We study the cosmological implications of the one-loop terms in string expansion. In particular, we find nonsingular solutions which interpolate between a contracting universe and an expanding universe, and show that these solutions provide a mechanism for removing the initial conditions problem peculiar to spatially closed FRW cosmologies. In addition, we perform numerical calculations to show that the nonsingular cosmologies do not require a careful choice of initial conditions, and estimate the likely magnitude of higher order terms in string expansion. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.54.7252
DOI:
10.1103/PhysRevD.54.7252
PACS:
98.80.Hw, 04.20.Dw, 04.50.+h, 11.25.Mj
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