Stress tensor of massless conformal quantum fields in hyperbolic universes

Details Stress tensor of massless conformal quantum fields in hyperbolic universes Stress tensor of massless conformal quantum fields in hyperbolic universes

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phrvd..18.1844b&link_type=abstract

Physical Review D (Particles and Fields), Volume 18, Issue 6, 15 September 1978, pp.1844-1848

Physics

24

Scientific paper

The vacuum expectation value of the renormalized stress tensor for a conformally coupled massless scalar field propagating in an arbitrary hyperbolic Robertson-Walker spacetime is calculated. The vacuum state used is that obtained by conformal transformation to the static hyperbolic universe. The result differs from calculations performed using the vacuum defined by conformal transformation to Minkowski spacetime, and is also different from earlier results obtained using the conformally static vacuum which are shown to be incorrect.

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