科研之友
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摘要
<jats:p>The thermal spectrum of radiation, seen by suitable observers using ’’Unruh particle detectors,’’ in de Sitter spacetime is recovered using Bogoliubov transformation techniques. Previous attempts by other authors at calculating particle production in de Sitter spacetime, prior to the discovery of thermal radiation using propagator techniques failed. The discrepancy between these previous mode mixing calculations, and the calculations presented here, are traced to ’’de Sitter invariant’’ versus ’’observer dependent’’ formalisms. One consequence is that the initial vacuum state chosen for the quantum field is not unique.</jats:p>
- 出版日期1978
