Journal
CLASSICAL AND QUANTUM GRAVITY
Volume 21, Issue 21, Pages 4993-5004Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0264-9381/21/21/016
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We calculate the response functions of a freely falling Unruh detector in de Sitter space coupled to scalar fields of different couplings to the curvature, including the minimally coupled massless case. Although the responses differ strongly in the infrared as a consequence of the amplification of superhorizon modes, the energy levels of the detector are thermally populated.
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