QFT, String Temperature and the String Phase of De Sitter Space-time

Details QFT, String Temperature and the String Phase of De Sitter Space-time QFT, String Temperature and the String Phase of De Sitter Space-time

1999-04-02

arxiv.org/abs/hep-th/9904015v1

Phys.Rev. D60 (1999) 125014

Physics

High Energy Physics

High Energy Physics - Theory

LaTex, 24 pages, no figures

Scientific paper

10.1103/PhysRevD.60.125014

The density of mass levels \rho(m) and the critical temperature for strings in de Sitter space-time are found. QFT and string theory in de Sitter space are compared. A `Dual'-transform is introduced which relates classical to quantum string lengths, and more generally, QFT and string domains. Interestingly, the string temperature in De Sitter space turns out to be the Dual transform of the QFT-Hawking-Gibbons temperature. The back reaction problem for strings in de Sitter space is addressed selfconsistently in the framework of the `string analogue' model (or thermodynamical approach), which is well suited to combine QFT and string study.We find de Sitter space-time is a self-consistent solution of the semiclassical Einstein equations in this framework. Two branches for the scalar curvature R(\pm) show up: a classical, low curvature solution (-), and a quantum high curvature solution (+), enterely sustained by the strings. There is a maximal value for the curvature R_{\max} due to the string back reaction. Interestingly, our Dual relation manifests itself in the back reaction solutions: the (-) branch is a classical phase for the geometry with intrinsic temperature given by the QFT-Hawking-Gibbons temperature.The (+) is a stringy phase for the geometry with temperature given by the intrinsic string de Sitter temperature. 2 + 1 dimensions are considered, but conclusions hold generically in D dimensions.

Affiliated with

Also associated with

No associations

Rating

QFT, String Temperature and the String Phase of De Sitter Space-time does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with QFT, String Temperature and the String Phase of De Sitter Space-time, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and QFT, String Temperature and the String Phase of De Sitter Space-time will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-110184