Rotation Operator vs Particle Creation in a Curved Space Time

Details Rotation Operator vs Particle Creation in a Curved Space Time Rotation Operator vs Particle Creation in a Curved Space Time

1996-10-16

arxiv.org/abs/hep-th/9610117v1

Nuovo Cim. B114 (1999) 515-522

Physics

High Energy Physics

High Energy Physics - Theory

10 pages

Scientific paper

Taking into account a neutral massive scalar field minimally coupled to gravity, in a Robertson-Walker metric, it is shown that when the final state is connected with the initial one by means of a Bogoliubov transformation, which does not include the single-mode rotation operator, the mean value of created particles is conserved. When the rotation operator is considered, it is still possible to use the approach of single-mode squeezed operators and get the entropy as the logarithm of the created particles.

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