Chaotic inflation with a scalar field in non-classical states

Details Chaotic inflation with a scalar field in non-classical states Chaotic inflation with a scalar field in non-classical states

1997-12-29

arxiv.org/abs/gr-qc/9712098v2

Phys.Rev.D58:103514,1998

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

19 pages, 9 postscript figures, latex. Final version as accepted for publication on Phys. Rev. D

Scientific paper

10.1103/PhysRevD.58.103514

We study chaotic inflation driven by a real, massive, homogeneous minimally coupled scalar field in a flat Robertson-Walker spacetime. The semiclassical limit for gravity is considered, whereas the scalar field is treated quantum mechanically by the technique of invariants in order to also investigate the dynamics of the system for non-classical states of the latter. An inflationary stage is found to be possible for a large set of initial quantum states, obviously including the coherent ones. States associated with a vanishing mean value of the field (such as the vacuum and the thermal) can also lead to inflation, however for such states we cannot make a definitive prediction due to the importance of higher order corrections during inflation. The results for the above coupled system are described and their corrections evaluated perturbatively.

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