Group Averaging of massless scalar fields in 1+1 de Sitter

Details Group Averaging of massless scalar fields in 1+1 de Sitter Group Averaging of massless scalar fields in 1+1 de Sitter

2008-08-15

arxiv.org/abs/0808.2174v2

Class.Quant.Grav.26:035001,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, accepted to Classical and Quantum Gravity

Scientific paper

10.1088/0264-9381/26/3/035001

Perturbative gravity in global de Sitter space is subject to so-called linearization stability constraints: If they are to couple consistently to the gravitational field, quantum states must be invariant under the de Sitter isometries. While standard Fock spaces contain no de Sitter-invariant states apart from (possibly) the vacuum, a full Hilbert space of de Sitter-invariant quantum states can be constructed via group averaging techiniques. We re-examine the simple toy model of de Sitter group averaging given by the free 1+1 scalar field, expanding on an earlier analysis by Higuchi. Our purpose is twofold: to include the scalar zero-mode, and to explicitly count the number of de Sitter-invariant states as a function of an appropriately defined energy.

Affiliated with

Also associated with

No associations

Rating

Group Averaging of massless scalar fields in 1+1 de Sitter 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 Group Averaging of massless scalar fields in 1+1 de Sitter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Group Averaging of massless scalar fields in 1+1 de Sitter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-651490