Boundary Conditions in Quantum String Cosmology

Details Boundary Conditions in Quantum String Cosmology Boundary Conditions in Quantum String Cosmology

1997-01-09

arxiv.org/abs/hep-th/9701035v2

Phys.Lett. B397 (1997) 185-192

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, REVTEX, minor changes, two references added

Scientific paper

10.1016/S0370-2693(97)00192-5

We discuss in detail how to consistently impose boundary conditions in quantum string cosmology. Since a classical time parameter is absent in quantum gravity, such conditions must be imposed with respect to intrinsic variables. Constructing wave packets for minisuperspace models from different tree-level string effective actions, we explain in particular the meaning of a transition between ``pre-big-bang" and ``post-big-bang" branches. This leads to a scenario different from previous considerations.

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