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“…This occurs mainly through a different viewpoint on test objects replacing geodesics, and through candidates for massive degrees of freedom not contained in general relativity. Many examples are discussed, e.g., in the recent review [19] to which we refer for details and more complete references.…”

confidence: 99%

“…This occurs mainly through a different viewpoint on test objects replacing geodesics, and through candidates for massive degrees of freedom not contained in general relativity. Many examples are discussed, e.g., in the recent review [19] to which we refer for details and more complete references.…”

confidence: 99%

“…which can easily be seen to reduce to the Friedmann equation (with energy density ρ = |p| −3/2 H matter ) once c and p are replaced in terms of a and ȧ using (19). This expression needs to be quantized by using "holonomies" e iµ 0 c/2 , with some µ 0 ∈ R to be chosen, for the connection components and Poisson brackets for the triad components.…”

confidence: 99%

“…Among others, solutions with the linear dilaton background in the null direction with 1 2 supersymmetry are proposed to describe the singular region in the spacetime without difficulty [6], and various extensions have been considered [7]- [26]. For a detailed review of the big-bang models in string theory see [27]. It has been argued that it is possible to map the theory near the singularity at a very early time to the dual matrix theory which allows us to discuss the behaviors of the solution in perturbative picture, whereas in the far future it can be thought of as a perturbative string theory with weak string coupling.…”

confidence: 99%

“…Some steps have already been taken in this direction and the future studies may seed the revolution for the string cosmology. See [28] for a recent review of the subject.…”

confidence: 99%