De sitter space and perpetuum mobile

摘要: The general arguments that any interacting nonconformal classical field theory in de Sitter space leads to the possibility of constructing a perpetuum mobile is given. are based on observation massive free falling particles can radiate other level as seen by observer. intensity radiation process not zero even for with finite mass, i.e., wavelength which within causal domain. Hence, we conclude either cannot exist eternally or one build mobile.