Conserved cosmological structures in the one-loop superstring effective action

Details Conserved cosmological structures in the one-loop superstring effective action Conserved cosmological structures in the one-loop superstring effective action

1999-09-29

arxiv.org/abs/astro-ph/9909480v1

Phys.Rev. D61 (2000) 043511

Astronomy and Astrophysics

Astrophysics

5 pages, no figure, To appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.61.043511

A generic form of low-energy effective action of superstring theories with one-loop quantum correction is well known. Based on this action we derive the complete perturbation equations and general analytic solutions in the cosmological spacetime. Using the solutions we identify conserved quantities characterizing the perturbations: the amplitude of gravitational wave and the perturbed three-space curvature in the uniform-field gauge both in the large-scale limit, and the angular-momentum of rotational perturbation are conserved independently of changing gravity sector. Implications for calculating perturbation spectra generated in the inflation era based on the string action are presented.

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