Unitary evolution of free massless fields in de Sitter space-time

Details Unitary evolution of free massless fields in de Sitter space-time Unitary evolution of free massless fields in de Sitter space-time

2007-12-10

arxiv.org/abs/0712.1421v2

Class.Quant.Grav.25:145008,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

20 pages. Comments and references added

Scientific paper

10.1088/0264-9381/25/14/145008

We consider the quantum dynamics of a massless scalar field in de Sitter space-time. The classical evolution is represented by a canonical transformation on the phase space for the field theory. By studying the corresponding Bogoliubov transformations, we show that the symplectic map that encodes the evolution between two instants of time cannot be unitarily implemented on any Fock space built from a SO(4)-symmetric complex structure. We will show also that, in contrast with some effectively lower dimensional examples arising from Quantum General Relativity such as Gowdy models, it is impossible to find a time dependent conformal redefinition of the massless scalar field leading to a quantum unitary dynamics.

Affiliated with

Also associated with

No associations

Rating

Unitary evolution of free massless fields in 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 Unitary evolution of free massless fields in de Sitter space-time, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Unitary evolution of free massless fields in de Sitter space-time will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-405216